CVE-2023-31126

Name: CVE-2023-31126
Creator: NVD / NIST
Published: 2023-05-09T13:15:18.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.6/10EPSS 0.82%

Last modified Jun 17, 2026

CVE-2023-31126 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. `org.xwiki.commons:xwiki-commons-xml` is an XML library used by the open-source wiki platform XWiki. The HTML sanitizer, introduced in version 14.6-rc-1, allows the injection of arbitrary HTML code and thus cross-site scripting via invalid data attributes. EPSS estimates a 0.82% chance of exploitation in the next 30 days.

Description

`org.xwiki.commons:xwiki-commons-xml` is an XML library used by the open-source wiki platform XWiki. The HTML sanitizer, introduced in version 14.6-rc-1, allows the injection of arbitrary HTML code and thus cross-site scripting via invalid data attributes. This vulnerability does not affect restricted cleaning in HTMLCleaner as there attributes are cleaned and thus characters like `/` and `>` are removed in all attribute names. This problem has been patched in XWiki 14.10.4 and 15.0 RC1 by making sure that data attributes only contain allowed characters. There are no known workarounds apart from upgrading to a version including the fix.

Metrics

CVSS 3.1

9.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS Probability

0.82%

52.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Xwiki	Xwiki	>= 14.6, < 14.10.4

References

https://github.com/xwiki/xwiki-commons/commit/0b8e9c45b7e7457043938f35265b2aa5adc76a68Patch
https://github.com/xwiki/xwiki-commons/security/advisories/GHSA-pv7v-ph6g-3gxvVendor Advisory
https://jira.xwiki.org/browse/XCOMMONS-2606Vendor Advisory
https://github.com/xwiki/xwiki-commons/commit/0b8e9c45b7e7457043938f35265b2aa5adc76a68Patch
https://github.com/xwiki/xwiki-commons/security/advisories/GHSA-pv7v-ph6g-3gxvVendor Advisory
https://jira.xwiki.org/browse/XCOMMONS-2606Vendor Advisory
https://jira.xwiki.org/browse/XCOMMONS-2606Vendor Advisory

Timeline

Published: May 9, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-31126?

How severe is CVE-2023-31126?

CVE-2023-31126 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.

How do I fix CVE-2023-31126?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-31126?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST