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Full vulnerability report · 2024
CVE-2024-1681High confidence

Log Injection Vulnerability in corydolphin/flask-cors

corydolphin · corydolphin/flask-cors

5.3MediumCVSS 3.1
Recommended action
Within 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:High, raised one band.upgradedsince 3 Nov 2025

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 0.58% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs corydolphin corydolphin/flask-cors and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcepython-flask-corsVendor fix publishedDebian records a fixed source-package version for this release.4.0.1-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcepython-flask-corsVendor fix publishedDebian records a fixed source-package version for this release.3.0.10-2+deb12u1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcepython-flask-corsVendor fix publishedDebian records a fixed source-package version for this release.4.0.1-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcepython-flask-corsVendor fix publishedDebian records a fixed source-package version for this release.4.0.1-1Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · esm-appspython-flask-corsVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.4.0.0-1ubuntu0.1~esm1Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Open-source package ranges1 source-attributed range

These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.

Ecosystem and packageAffected rangeFirst fixed versionEvidence
pipflask-cors<= 4.0.04.0.1GitHub advisory ↗github reviewed aggregator · 5 Jun 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2024-1681 · CSAF 2.0 · revision 9 · interimSUSE Product Security TeamCVE-2024-1681
5 recommended

The vendor recommends these product versions as the target state.

  • python310-Flask-Cors-4.0.1-1.1 as component of openSUSE Tumbleweed
  • python311-Flask-Cors-4.0.1-1.1 as component of openSUSE Tumbleweed
  • python312-Flask-Cors-4.0.1-1.1 as component of openSUSE Tumbleweed
  • python313-Flask-Cors-6.0.2-1.2 as component of openSUSE Tumbleweed
  • python314-Flask-Cors-6.0.2-1.2 as component of openSUSE Tumbleweed
Summary
corydolphin/flask-cors is vulnerable to log injection when the log level is set to debug. An attacker can inject fake log entries into the log file by sending a specially crafted GET request containing a CRLF sequence in the request path. This vulnerability allows attackers to corrupt log files, potentially covering tracks of other attacks, confusing log post-processing tools, and forging log entries. The issue is due to improper output neutralization for logs.
Remediation
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2024-1152

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

corydolphin/flask-cors is vulnerable to log injection when the log level is set to debug. An attacker can inject fake log entries into the log file by sending a specially crafted GET request containing a CRLF sequence in the request path. This vulnerability allows attackers to corrupt log files, potentially covering tracks of other attacks, confusing log post-processing tools, and forging log entries. The issue is due to improper output neutralization for logs.

What

corydolphin/flask-cors is vulnerable to log injection when the log level is set to debug. An attacker can inject fake log entries into the log file by sending a specially crafted GET request containing a CRLF sequence in the request path. This vulnerability allows attackers to corrupt log files, potentially covering tracks of other attacks, confusing log post-processing tools, and forging log entries. The issue is due to improper output neutralization for logs.

Why

The product constructs a log message from external input, but it does not neutralize or incorrectly neutralizes special elements when the message is written to a log file.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

corydolphin/flask-cors is vulnerable to log injection when the log level is set to debug. An attacker can inject fake log entries into the log file by sending a specially crafted GET request containing a CRLF sequence in the request path. This vulnerability allows attackers to corrupt log files, potentially covering tracks of other attacks, confusing log post-processing tools, and forging log entries. The issue is due to improper output neutralization for logs.

Why

The product constructs a log message from external input, but it does not neutralize or incorrectly neutralizes special elements when the message is written to a log file.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Improper Output Neutralization for Logs → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-117 ↗

CWE-117: Improper Output Neutralization for Logs. The product constructs a log message from external input, but it does not neutralize or incorrectly neutralizes special elements when the message is written to a log file.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.ILowIntegrity impact: A successful attack can cause a limited loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-117Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

Cyber Security Agency of Singapore · English · CSA-SB-20240424Security Bulletin 24 Apr 2024

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 24 Apr 2024, published on 24 April 2024. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0233Multiples vulnérabilités dans les produits IBM

/CVERecord?id=CVE-2012-5784 Référence CVE CVE-2014-3596 https://www.cve.org/CVERecord?id=CVE-2014-3596 Référence CVE CVE-2018-8032 https://www.cve.org/CVERecord?id=CVE-2018-8032 Référence CVE CVE-2019-0227 https://www.cve.org/CVERecord?id=CVE-2019-0227 Référence CVE CVE-2021-38986 https://www.cve.org/CVERecord?id=CVE-2021-38986 Référence CVE CVE-2022-22321 https://www.cve.org/CVERecord?id=CVE-2022-22321 Référence CVE CVE-2023-28439 https://www.cve.org/CVERecord?id=CVE-2023-28439 Référence CVE CVE-2023-46136 https://www.cve.org/CVERecord?id=CVE-2023-46136 Référence CVE CVE-2024-1135 https://www.cve.org/CVERecord?id=CVE-2024-1135 Référence CVE CVE-2024-1681 https://www.cve.org/CVERecord?id=CVE-2024-1681 Référence CVE CVE-2024-22195 https://www.cve.org/CVERecord?id=CVE-2024-22195 Référence CVE CVE-2024-29041 https://www.cve.org/CVERecord?id=CVE-2024-29041 Référence CVE CVE-2024-34064 https://www.cve.org/CVERecord?id=CVE-2024-34064 Référence CVE CVE-2024-34069 https://www.cve.org/CVERecord?id=CVE-2024-34069 Référence CVE CVE-2024-35195 https://www.cve.org/CVERecord?id=CVE-2024-35195 Référence CVE CVE-2024-3651 https://www.cve.org/CVERecord?id=CVE-2024-3651 Référence CVE CVE-2024-37891 https://www.cve.org/CVERecord?id=CVE-2024-37891 Référence CVE CVE-2024-39689 https://www.cve.org/CVERecord?id=CVE

Official advisory ↗
CERT-FR · French · CERTFR-2024-AVI-0514Multiples vulnérabilités dans les produits IBM

ERecord?id=CVE-2023-35116 Référence CVE CVE-2023-3817 https://www.cve.org/CVERecord?id=CVE-2023-3817 Référence CVE CVE-2023-38545 https://www.cve.org/CVERecord?id=CVE-2023-38545 Référence CVE CVE-2023-39325 https://www.cve.org/CVERecord?id=CVE-2023-39325 Référence CVE CVE-2023-3978 https://www.cve.org/CVERecord?id=CVE-2023-3978 Référence CVE CVE-2023-42282 https://www.cve.org/CVERecord?id=CVE-2023-42282 Référence CVE CVE-2023-45288 https://www.cve.org/CVERecord?id=CVE-2023-45288 Référence CVE CVE-2023-47726 https://www.cve.org/CVERecord?id=CVE-2023-47726 Référence CVE CVE-2023-5363 https://www.cve.org/CVERecord?id=CVE-2023-5363 Référence CVE CVE-2024-1681 https://www.cve.org/CVERecord?id=CVE-2024-1681 Référence CVE CVE-2024-22243 https://www.cve.org/CVERecord?id=CVE-2024-22243 Référence CVE CVE-2024-22257 https://www.cve.org/CVERecord?id=CVE-2024-22257 Référence CVE CVE-2024-22259 https://www.cve.org/CVERecord?id=CVE-2024-22259 Référence CVE CVE-2024-22262 https://www.cve.org/CVERecord?id=CVE-2024-22262 Référence CVE CVE-2024-22329 https://www.cve.org/CVERecord?id=CVE-2024-22329 Référence CVE CVE-2024-22354 https://www.cve.org/CVERecord?id=CVE-2024-22354 Référence CVE CVE-2024-23081 https://www.cve.org/CVERecord?id=CVE-2024-23081 Référence CVE CVE-2024-23082 https://www.cve.org/CVERecord?id=C

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2024-026719corydolphin の flask-cors における不適切なログ出力の無効化に関する脆弱性

corydolphin の flask-cors には、不適切なログ出力の無効化に関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
corydolphin/flask-cors: unspecified ≤ latest
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 19 Apr 2024 · Last source change 3 Nov 2025, 19:29 UTC · CWE-117 · Improper Output Neutralization for Logs

CVE recordCVE.org · 5.2
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2024-1152
Product sourceCNA
Remediation sourceVendor CSAF · SUSE Product Security Team
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Remediation statusRemediation status changed from Awaiting fix to Mitigation available.
    Before
    Awaiting fix
    After
    Mitigation available
    SUSE Product Security Team ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2024-1681 · cve.blacktree.nl