CVE-2021-32768Network attack vector

Cross-site scripting via incomplete HTMLparser sanitization

Published Aug 10, 2021 · Updated Aug 3, 2024

Cross-site scripting in affected TYPO3 CMS releases allows remote authenticated users to execute script through malicious rich-text content. TypoScript HTMLparser rendering omits some dangerous tag-and-attribute combinations, and incomplete backend node defaults let unsafe markup reach the frontend. Default exploitation requires a valid backend account and victim interaction; custom frontend plugins that accept and reflect rich text can expose unauthenticated visitors to script execution.

CVSS severity6.1
Medium
EPSS probability0.73%
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 affected TYPO3 CMS releases allows remote authenticated users to execute script through malicious rich-text content. TypoScript HTMLparser rendering omits some dangerous tag-and-attribute combinations, and incomplete backend node defaults let unsafe markup reach the frontend. Default exploitation requires a valid backend account and victim interaction; custom frontend plugins that accept and reflect rich text can expose unauthenticated visitors to script execution.

The record

CVE
CVE-2021-32768
Published
Aug 10, 2021
Updated
Aug 3, 2024
Vendor
in2code GmbH
Product
TYPO3 CMS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 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=>= 10.0.0, < 10.4.19
  2. Affected versionversion=>= 11.0.0, < 11.3.2
  3. Affected versionversion=>= 7.0.0, < 7.6.53
  4. Affected versionversion=>= 8.0.0, < 8.7.42
  5. Affected versionversion=>= 9.0.0, < 9.5.29

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

in2code GmbH · TYPO3 CMSversion=>= 10.0.0, < 10.4.19; version=>= 11.0.0, < 11.3.2; version=>= 7.0.0, < 7.6.53; version=>= 8.0.0, < 8.7.42; version=>= 9.0.0, < 9.5.29

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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