org.xwiki.commons:xwiki-commons-xml's HTML sanitizer allows form elements in restricted
Impact
The HTML sanitizer that is included in XWiki since version 14.6RC1 allowed form and input HTML tags. In the context of XWiki, this allows an attacker without script right to either create forms that can be used for phishing attacks or also in the context of a sheet, the attacker could add an input like {{html}}<input type="hidden" name="content" value="{{groovy}}println("Hello from Groovy!")" />{{/html}} that would allow remote code execution when it is submitted by an admin (the sheet is rendered as part of the edit form). The attacker would need to ensure that the edit form looks plausible, though, which can be non-trivial as without script right the attacker cannot display the regular content of the document.
Patches
This has been patched in XWiki 14.10.6 and 15.2RC1 by removing the central form-related tags from the list of allowed tags.
Workarounds
An admin can manually disallow the tags by adding form, input, select, textarea, button to the configuration option xml.htmlElementSanitizer.forbidTags in the xwiki.properties configuration file.
References
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.xwiki.commons:xwiki-commons-xml | >= 14.6-rc-1, < 14.10.6, >= 15.0-rc-1, < 15.2-rc-1 | 14.10.6, 15.2-rc-1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H- Weakness (CWE)
CWE-74, CWE-79- Platform
- Java / Kotlin (Maven)
- Package
org.xwiki.commons:xwiki-commons-xml- Disclosed
- 30.06.2023
- Updated
- 11.10.2026 13:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-6pqf-c99p-758v - CC BY 4.0
Vulnerability history: org.xwiki.commons:xwiki-commons-xml
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 04.2022 06.2023
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 5
- Medium 1
Disclosures per year
- 2022: 1
- 2023: 5
- 2024: 0
- 2025: 0
- 2026: 0
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