CVE-2021-33664Network attack vector

Session credential theft via unencoded browser output

Published Jun 9, 2021 · Updated Aug 3, 2024

Cross-site scripting in Web Dynpro ABAP on SAP NetWeaver Application Server ABAP allows remote authenticated users to steal session credentials. The BC-WD-ABA component fails to encode user-controlled values before placing them in generated browser content, so injected markup or JavaScript executes in a victim's authenticated browser context. Exploitation requires low-privileged access and user interaction, and the reported impact is limited to session credential theft and browser-side content modification.

CVSS severity5.4
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Web Dynpro ABAP on SAP NetWeaver Application Server ABAP allows remote authenticated users to steal session credentials. The BC-WD-ABA component fails to encode user-controlled values before placing them in generated browser content, so injected markup or JavaScript executes in a victim's authenticated browser context. Exploitation requires low-privileged access and user interaction, and the reported impact is limited to session credential theft and browser-side content modification.

The record

CVE
CVE-2021-33664
Published
Jun 9, 2021
Updated
Aug 3, 2024
Vendor
SAP SE
Product
SAP NetWeaver Application Server ABAP
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 31
  2. Affected versionversion=< 752
  3. Affected versionversion=< 753
  4. Affected versionversion=< 754
  5. Affected versionversion=< 755
  6. Affected versionversion=< SAP_BASIS - 702
  7. Affected versionversion=< SAP_UI - 750

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SAP SE · SAP NetWeaver Application Server ABAPversion=< 31; version=< 752; version=< 753; version=< 754; version=< 755; version=< SAP_BASIS - 702; version=< SAP_UI - 750

Published CVSS scores

5.4SAP SECVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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