GHSA-m8fw-p3cr-6jqc
Cross-Site Scripting in CKEditor4 WordCount Plugin
GHSA-m8fw-p3cr-6jqc is a medium vulnerability (CVSS 4.7) in typo3/cms-rte-ckeditor, published July 25, 2023. No source lists public exploit code. Fixed in typo3/cms-rte-ckeditor 9.5.42.
- Severity
- 4.7 MediumCVSS 3.1, GitHub Advisories
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
9.5.42typo3/cms-rte-ckeditor +5 more
Description
CVSS:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C(4.4)
Problem
The WordCount plugin (npm:ckeditor-wordcount-plugin) for CKEditor4 is vulnerable to cross-site scripting when switching to the source code mode. This plugin is enabled via the Full.yaml configuration present, but is not active in the default configuration.
In default scenarios, exploiting this vulnerability requires a valid backend user account. However, if custom plugins are used on the website frontend, which accept and reflect rich-text content submitted by users, no authentication is required.
Solution
Update to TYPO3 versions 9.5.42 ELTS, 10.4.39 ELTS, 11.5.30 that fix the problem described above.
Credits
Thanks to Sybille Peters who reported this issue, and to TYPO3 core & security team member Oliver Hader who fixed the issue.
References
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Affected packages
| Package | Affected | Fixed |
|---|---|---|
typo3/cms-rte-ckeditorPackagist | 9.5.0 up to 9.5.42 | 9.5.42 |
typo3/cms-rte-ckeditorPackagist | 10.0.0 up to 10.4.39 | 10.4.39 |
typo3/cms-rte-ckeditorPackagist | 11.0.0 up to 11.5.30 | 11.5.30 |
typo3/cms-rte-ckeditorPackagist | 9.5.0 up to 9.5.42, plus listed versions v9.5.0v9.5.1v9.5.10v9.5.11v9.5.12 Show 27 moreShow lessv9.5.13v9.5.14v9.5.15v9.5.16v9.5.17v9.5.18v9.5.19v9.5.2v9.5.20v9.5.21v9.5.22v9.5.23v9.5.24v9.5.25v9.5.26v9.5.27v9.5.28v9.5.29v9.5.3v9.5.30v9.5.31v9.5.4v9.5.5v9.5.6v9.5.7v9.5.8v9.5.9 | 9.5.42 |
typo3/cms-rte-ckeditorPackagist | 10.0.0 up to 10.4.39, plus listed versions v10.0.0v10.1.0v10.2.0v10.2.1v10.2.2 Show 38 moreShow lessv10.3.0v10.4.0v10.4.1v10.4.10v10.4.11v10.4.12v10.4.13v10.4.14v10.4.15v10.4.16v10.4.17v10.4.18v10.4.19v10.4.2v10.4.20v10.4.21v10.4.22v10.4.23v10.4.24v10.4.25v10.4.26v10.4.27v10.4.28v10.4.29v10.4.3v10.4.30v10.4.31v10.4.32v10.4.33v10.4.34v10.4.36v10.4.37v10.4.4v10.4.5v10.4.6v10.4.7v10.4.8v10.4.9 | 10.4.39 |
typo3/cms-rte-ckeditorPackagist | 11.0.0 up to 11.5.30, plus listed versions v11.0.0v11.1.0v11.1.1v11.2.0v11.3.0 Show 34 moreShow lessv11.3.1v11.3.2v11.3.3v11.4.0v11.5.0v11.5.1v11.5.10v11.5.11v11.5.12v11.5.13v11.5.14v11.5.15v11.5.16v11.5.17v11.5.18v11.5.19v11.5.2v11.5.20v11.5.21v11.5.22v11.5.23v11.5.24v11.5.25v11.5.26v11.5.27v11.5.28v11.5.29v11.5.3v11.5.4v11.5.5v11.5.6v11.5.7v11.5.8v11.5.9 | 11.5.30 |
What each source reports
GitHub Advisories Score used
Cross-Site Scripting in CKEditor4 WordCount Plugin
CVSS:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C(4.4)
Problem
The WordCount plugin (npm:ckeditor-wordcount-plugin) for CKEditor4 is vulnerable to cross-site scripting when switching to the source code mode. This plugin is enabled via the Full.yaml configuration present, but is not active in the default configuration.
In default scenarios, exploiting this vulnerability requires a valid backend user account. However, if custom plugins are used on the website frontend, which accept and reflect rich-text content submitted by users, no authentication is required.
Solution
Update to TYPO3 versions 9.5.42 ELTS, 10.4.39 ELTS, 11.5.30 that fix the problem described above.
Credits
Thanks to Sybille Peters who reported this issue, and to TYPO3 core & security team member Oliver Hader who fixed the issue.
References
- Record
GHSA-m8fw-p3cr-6jqc- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
Cross-Site Scripting in CKEditor4 WordCount Plugin
CVSS:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C(4.4)
Problem
The WordCount plugin (npm:ckeditor-wordcount-plugin) for CKEditor4 is vulnerable to cross-site scripting when switching to the source code mode. This plugin is enabled via the Full.yaml configuration present, but is not active in the default configuration.
In default scenarios, exploiting this vulnerability requires a valid backend user account. However, if custom plugins are used on the website frontend, which accept and reflect rich-text content submitted by users, no authentication is required.
Solution
Update to TYPO3 versions 9.5.42 ELTS, 10.4.39 ELTS, 11.5.30 that fix the problem described above.
Credits
Thanks to Sybille Peters who reported this issue, and to TYPO3 core & security team member Oliver Hader who fixed the issue.
References
- Record
GHSA-m8fw-p3cr-6jqc- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.