Answer in brief
CVE-2023-29528 records a Critical severity (CVSS 9.0) vulnerability in Cross-site Scripting in org.xwiki.commons:xwiki-commons-xml. The current sources do not mark it as known exploited. The current feed maps org.xwiki.commons:xwiki-commons-xml (maven). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.xwiki.commons:xwiki-commons-xml (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| org.xwiki.commons:xwiki-commons-xmlmaven | >=4.2-milestone-1 <14.10 | 14.10 |
Published upstream
Apr 20, 2023
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Sep 10, 2026
### Impact The "restricted" mode of the HTML cleaner in XWiki, introduced in version 4.2-milestone-1 and massively improved in version 14.6-rc-1, allowed the injection of arbitrary HTML code and thus cross-site scripting via invalid HTML comments. As a consequence, any code relying on this "restricted" mode for security is vulnerable to JavaScript injection ("cross-site scripting"/XSS). An example are anonymous comments in XWiki where the HTML macro filters HTML using restricted mode: ```html {{html}} <!--> <Details Open OnToggle=confirm("XSS")> {{/html}} ``` When a privileged user with programming rights visits such a comment in XWiki, the malicious JavaScript code is executed in the context of the user session. This allows server-side code execution with programming rights, impacting the confidentiality, integrity and availability of the XWiki instance. Note that while all versions since 4.2-milestone-1 should be vulnerable, only starting with version 14.6-rc-1 the HTML comment is necessary for the attack to succeed due to [another vulnerability](https://github.com/xwiki/xwiki-commons/security/advisories/GHSA-m3jr-cvhj-f35j) that has been patched in version 14.6-rc-1. ### Patches This problem has been patched in XWiki 14.10, HTML comments are now removed in restricted mode and a check has been introduced that ensures that comments don't start with `>`. ### Workarounds There are no known workarounds apart from upgrading to a version including the fix. ### References * https://jira.xwiki.org/browse/XCOMMONS-2568 * https://jira.xwiki.org/browse/XWIKI-20348 * https://github.com/xwiki/xwiki-commons/commit/8ff1a9d7e5d7b45b690134a537d53dc05cae04ab ### For more information If you have any questions or comments about this advisory: * Open an issue in [Jira XWiki](https://jira.xwiki.org/) * Email us at [XWiki Security mailing-list](mailto:[email protected]) ### Attribution This vulnerability was reported on Intigriti by [ynoof](https://twitter.com/ynoofAssiri) @Ynoof5.
Quoted source text, attributed separately from HOL analysis.