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Full vulnerability report · 2026
CVE-2026-40545High confidence

Reflected XSS in SOPlanning

SOPlanning · SOPlanning

5.1MediumCVSS 4.0
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

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-2026-33611

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 actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
01

What, why and how

SOPlanning is vulnerable to Reflected XSS via the taches parameter. An attacker can craft a malicious URL which, when opened by authenticated victim, results in arbitrary JavaScript execution in the victim’s browser. This issue affects SOPlanning version 1.55 and below.

What

SOPlanning is vulnerable to Reflected XSS via the taches parameter. An attacker can craft a malicious URL which, when opened by authenticated victim, results in arbitrary JavaScript execution in the victim’s browser. This issue affects SOPlanning version 1.55 and below.

Why

Attacker-controlled content can reach a browser as executable script without sufficient output encoding or sanitisation.

How

An attacker operating through a network path may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

SOPlanning is vulnerable to Reflected XSS via the taches parameter. An attacker can craft a malicious URL which, when opened by authenticated victim, results in arbitrary JavaScript execution in the victim’s browser. This issue affects SOPlanning version 1.55 and below.

Why

Attacker-controlled content can reach a browser as executable script without sufficient output encoding or sanitisation.

How

An attacker operating through a network path may attempt exploitation when the stated preconditions are met. 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.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Active interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-79

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Common Vulnerability Scoring System 4.0: 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.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIActiveUser interaction: A user must take a deliberate action for exploitation to succeed.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VINoneVulnerable-system integrity: No direct loss is represented by this metric.VANoneVulnerable-system availability: No direct loss is represented by this metric.SCLowSubsequent-system confidentiality: A successful attack can cause a limited loss.SILowSubsequent-system integrity: A successful attack can cause a limited loss.SANoneSubsequent-system availability: 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-79
A

Official authority intelligence

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

CERT Polska · Polish · CVE-2026-40543CERT Polska w social mediach

CERT Polska otrzymał zgłoszenie o podatnościach w oprogramowaniu SOPlanning i koordynował proces ujawniania informacji. Podatność CVE-2026-40543 : SOPlanning nie wymusza autoryzacji dla funkcji tworzenia kopii zapasowych. Nieuwierzytelniony atakujący może bezpośrednio odpytać endpointy związane z kopiami zapasowymi i uzyskać dostęp do archiwów kopii zapasowych zawierających bazy danych użytkowników z nazwami użytkowników i hashami haseł, oraz plik config.csv, który zawiera dodatkowe poufne informacje. Podatność CVE-2026-40544 : SOPlanning jest podatne na atak typu Stored Cross-Site Scripting (XSS) w endpointcie /process/upload_backup . Uwierzytelniony atakujący z dostępem do funkcjonalności tworzenia kopii zapasowych może przesłać spreparowane archiwum ZIP zawierające plik user.csv z osadzonym kodem JavaScript. Gdy użytkownik kliknie przycisk Edytuj dla złośliwej kopii zapasowej, wstrzyknięty kod zostanie wykonywany w jego przeglądarce. Podatność CVE-2026-40545 : SOPlanning jest podatne na atak typu Reflected XSS poprzez parametr taches . Atakujący może przygotować złośliwy URL, który, gdy zostanie otwarty przez uwierzytelnioną ofiarę, prowadzi do wykonania dowolnego kodu JavaScript w przeglądarce ofiary. Podatność CVE-2026-40546 : SOPlanning jest podatne na ataki typu SQL Injection w wielu endpointach i parametrach. Atakujący z niskimi uprawnieniami może wstrzykiwać dowolne polecenia SQL, co może prowadzić do pełnej kontroli nad bazą danych. Podatność CVE-2026-40547 : SOPlanning jest podatne na atak typu Path Traversal w endpointach kopii zapasowych. Zdalny, uwierzytelniony atakujący, może wykorzystać podatny endpoint i skonstruować zapytania, które umożliwiają odczytywanie i wykonywanie plików wcześniej dodanych za pomocą funkcjonalności kopii zapasowych. Co istotne, przy wykorzystaniu CVE-2026-40543 (Brak Autoryzacji), każdy plik kopii zapasowej może być odczytany przez dowolnego (nieautoryzowanego) użytkownika. Podatność CVE-2026-40548 : SOPlanning nie weryfikuje rozszerzeń plików, które przesyłane są jako kopie zapasowe. Uwierzytelniony atakujący z dostępem do funkcji tworzenia kopii zapasowej może przesłać spreparowane archiwum ZIP zawierające plik user.csv oraz złośliwy plik. Całe archiwum zostanie rozpakowane na serwerze. W połączeniu z CVE-2026-40547 (Path Traversal) złośliwy plik (np. skrypt PHP) może zostać umieszczony w lokalizacji dostępnej z sieci i wykonany poprzez przeglądarkę. Podatność CVE-2026-40549 : SOPlanning jest podatne na atak typu Cross-Site Request Forgery (CSRF) w endpointach groupe_save . Atakujący może stworzyć złośliwą stronę internetową, która, gdy zostanie odwiedzona przez uwierzytelnionego użytkownika, automatycznie wyśle sfałszowane żądanie GET lub POST do aplikacji. Problemy te dotyczą SOPlanning w wersjach 1.55 i niższych.

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.
Fix not verified
Affected
≤ 1.55
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
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 1 Jun 2026 · Last source change 1 Jun 2026, 13:03 UTC · CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVE recordCVE.org · 5.2
CVSS sourceCNA
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-2026-33611
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD not scheduled

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

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

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-2026-40545 · cve.blacktree.nl