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Full vulnerability report · 2021
CVE-2021-33672High confidence

Due to missing encoding in SAP Contact Center's Communication Desktop component- version 700, an attacker could send malicious script in chat message

SAP SE · SAP Contact Center

9.6CriticalCVSS 3.1
Recommended action
Within 7 days

Critical technical severity; prioritise exposed affected systems while verifying vendor guidance.

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-2021-20349

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

Critical technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

Due to missing encoding in SAP Contact Center's Communication Desktop component- version 700, an attacker could send malicious script in chat message. When the message is accepted by the chat recipient, the script gets executed in their scope. Due to the usage of ActiveX in the application, the attacker can further execute operating system level commands in the chat recipient's scope. This could lead to a complete compromise of their confidentiality, integrity, and could temporarily impact their availability.

What

Due to missing encoding in SAP Contact Center's Communication Desktop component- version 700, an attacker could send malicious script in chat message. When the message is accepted by the chat recipient, the script gets executed in their scope. Due to the usage of ActiveX in the application, the attacker can further execute operating system level commands in the chat recipient's scope. This could lead to a complete compromise of their confidentiality, integrity, and could temporarily impact their availability.

Why

The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

How

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

What

Due to missing encoding in SAP Contact Center's Communication Desktop component- version 700, an attacker could send malicious script in chat message. When the message is accepted by the chat recipient, the script gets executed in their scope. Due to the usage of ActiveX in the application, the attacker can further execute operating system level commands in the chat recipient's scope. This could lead to a complete compromise of their confidentiality, integrity, and could temporarily impact their availability.

Why

The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

How

An attacker operating through a network path may attempt exploitation without authentication after a 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.
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 Encoding or Escaping of Output → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-116

CWE-116: Improper Encoding or Escaping of Output. The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

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:R/S:C/C:H/I:H/A:H

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.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SChangedScope: The attack can affect a component governed by a different security authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
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-116
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-20210915Security Bulletin 15 Sep 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 15 Sep 2021, published on 15 September 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-702Multiples vulnérabilités dans les produits SAP

- 7.22, 7.49, 7.53, 7.77, 7.81, 7.83 Résumé De multiples vulnérabilités ont été découvertes dans les produits SAP. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et un contournement de la politique de sécurité. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité SAP 585106405 du 14 septembre 2021 https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=585106405 Référence CVE CVE-2021-21489 https://www.cve.org/CVERecord?id=CVE-2021-21489 Référence CVE CVE-2021-33672 https://www.cve.org/CVERecord?id=CVE-2021-33672 Référence CVE CVE-2021-33673 https://www.cve.org/CVERecord?id=CVE-2021-33673 Référence CVE CVE-2021-33674 https://www.cve.org/CVERecord?id=CVE-2021-33674 Référence CVE CVE-2021-33675 https://www.cve.org/CVERecord?id=CVE-2021-33675 Référence CVE CVE-2021-33679 https://www.cve.org/CVERecord?id=CVE-2021-33679 Référence CVE CVE-2021-33685 https://www.cve.org/CVERecord?id=CVE-2021-33685 Référence CVE CVE-2021-33686 https://www.cve.org/CVERecord?id=CVE-2021-33686 Référence CVE CVE-2021-33688 https://www.cve.org/CVERecord?id=CVE-2021-33688 Référence CVE CVE-2021-33698 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-011915SAP Contact Center におけるエンコードおよびエスケープに関する脆弱性

SAP Contact Center には、エンコードおよびエスケープに関する脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5395SAP 제품 취약점 보안 업데이트 권고

#### SAP 제품 취약점 보안 업데이트 권고 2021.09.17 ##### □ 개요 o SAP 社는 자사 제품의 취약점을 해결한 보안 업데이트 공지 [1] o 공격자는 취약점을 악용하여 피해를 발생시킬 수 있으므로, 해당 제품을 사용하는 이용자들은 최신 버전으로 업데이트 권고 ##### □ 설명 [1] o SAP NetWeaver Application Server에서 미흡한 권한 검증으로 인해 발생하는 임의코드실행 취약점(CVE-2021-37535) o SAP NZDT Mapping Table Framework에서 입력값 검증이 미흡하여 발생하는 SQL 인젝션 취약점(CVE-2021-38176) o SAP NetWeaver에서 발생하는 파일업로드 취약점(CVE-2021-38163) o SAP NetWeaver Knowledge Management에서 발생하는 코드 인젝션 취약점(CVE-2021-37531) o SAP Contact Center에서 입력값 검증이 미흡하여 발생하는 명령어 삽입 취약점(CVE-2021-33672) 등 4개 o SAP Web Dispatcher에서 발생하는 HTTP Request Smuggling 취약점(CVE-2021-38162) ##### □ 영향받는 제품 o SAP NetWeaver Application Server : 7.11, 7.20, 7.30, 7.31, 7.40, 7.50 o SAP S/4HANA : 1511, 1610, 1709, 1809, 1909, 2020, 2021 o SAP LT Replication Server : 2.0, 3.0 o SAP LTRS for S/4HANA : 1.0 o SAP Test Data Migration Server : 4.0 o SAP Landscape Transformation, version : 2.0 o SAP NetWeaver(Visual Composer 7.0 RT) : 7.30, 7.31, 7.40, 7.50 o SAP NetWeaver Knowledge Management XML Forms : 7.10, 7.11, 7.30, 7.31, 7.40, 7.50 o SAP Contact Center : 700 o SAP Web Dispatcher - WEBDISP : 7.49, 7.53, 7.77, 7.81 - KRNL64NUC : 7.22, 7.22EXT, 7.49 - KRNL64

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
SAP Contact Center: < 700
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 14 Sept 2021 · Last source change 3 Aug 2024, 23:58 UTC · CWE-116 · Improper Encoding or Escaping of Output

CVE recordCVE.org · 5.1
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-2021-20349
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
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 ↗

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-2021-33672 · cve.blacktree.nl