🛡️ CVE-2023-31126 — xwiki

🔴 CVSS 9.5 — Critical ✅ No Known Exploit CWE-79 NVD
9.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Improper Neutralization of Invalid Characters in Data Attribute Names in org.xwiki.commons:xwiki-commons-xml

Impact

The HTML sanitizer, introduced in version 14.6-rc-1, allowed the injection of arbitrary HTML code and thus cross-site scripting via invalid data attributes. This can be exploited, e.g., via the link syntax in any content that supports XWiki syntax like comments in XWiki:

```

[[Link1>>https://XWiki.example.com||data-x/onmouseover="alert('XSS1')"]].

```

When a user moves the mouse over this link, the malicious JavaScript code is executed in the context of the user session. When this user is a privileged user who has programming rights, this allows server-side code execution with programming rights, impacting the confidentiality, integrity and availability of the XWiki instance.

Note that 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.

Patches

This problem has been patched in XWiki 14.10.4 and 15.0 RC1 by making sure that data attributes only contain allowed characters.

Workarounds

There are no known workarounds apart from upgrading to a version including the fix.

References

  • https://jira.xwiki.org/browse/XCOMMONS-2606
  • https://github.com/xwiki/xwiki-commons/commit/0b8e9c45b7e7457043938f35265b2aa5adc76a68

For more information

If you have any questions or comments about this advisory:

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2023-31126 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2023-31126 is recorded against 2 packages.

  • org.xwiki.commons:xwiki-commons-xml (from 14.6-rc-1 up to 14.10.4)
  • xwiki (from 14.6 up to 14.10.4)

Timeline and source

Published on 9 May 2023 and last revised on 16 February 2024. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)
jira.xwiki.org (Web)

Details

Severity CRITICAL
CVSS Score 9.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CWE CWE-79
Public Exploit ✅ No
Source NVD
Published 2023-05-09
Updated 2026-08-12
Modified 2024-02-16

Affected Packages

Software From version Fixed in
org.xwiki.commons:xwiki-commons-xml 14.6-rc-1 14.10.4
xwiki 14.6 14.10.4

Similar Threats

Exploit Protection

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