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Fencer Vulns
critical 10.0

CVE-2023-36470 json

Code injection in icon themes of XWiki Platform

published 2023-06-29 3 y ago modified 2026-06-17 4 mo ago also GHSA-fm68-j7ww-h9xf , EUVD-2023-1785

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. By either creating a new or editing an existing document with an icon set, an attacker can inject XWiki syntax and Velocity code that is executed with programming rights and thus allows remote code execution. There are different attack vectors, the simplest is the Velocity code in the icon set's HTML or XWiki syntax definition. The [icon picker](https://extensions.xwiki.org/xwiki/bin/view/Extension/Icon%20Theme%20Application#HIconPicker) can be used to trigger the rendering of any icon set. The XWiki syntax variant of the icon set is also used without any escaping in some documents, allowing to inject XWiki syntax including script macros into a document that might have programming right, for this the currently used icon theme needs to be edited. Further, the HTML output of the icon set is output as JSON in the icon picker and this JSON is interpreted as XWiki syntax, allowing again the injection of script macros into a document with programming right and thus allowing remote code execution. This impacts the confidentiality, integrity and availability of the whole XWiki instance. This issue has been patched in XWiki 14.10.6 and 15.1. Icon themes now require script right and the code in the icon theme is executed within the context of the icon theme, preventing any rights escalation. A macro for displaying icons has been introduced to avoid injecting the raw wiki syntax of an icon set into another document. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Patch / fix

  • maven org.xwiki.platform:xwiki-platform-icon-default 14.10.6, 15.2-rc-1
  • maven org.xwiki.platform:xwiki-platform-icon-script 14.10.6, 15.2-rc-1
  • maven org.xwiki.platform:xwiki-platform-icon-ui 14.10.6, 15.2-rc-1
  • xwiki xwiki 14.10.6

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
23 mo ago

Exploit prediction

1.93% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-fm68-j7ww-h9xf referenced PoC, tagged "exploit" by a source, unverified
  • jira.xwiki.org https://jira.xwiki.org/browse/XWIKI-20524 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.xwiki.platform:xwiki-platform-icon-default
>=6.2-milestone-1, <14.10.6
>=15.0-rc-1, <15.2-rc-1
14.10.6
15.2-rc-1
maven org.xwiki.platform:xwiki-platform-icon-script
>=6.2-milestone-1, <14.10.6
>=15.0-rc-1, <15.2-rc-1
14.10.6
15.2-rc-1
maven org.xwiki.platform:xwiki-platform-icon-ui
>=6.2-milestone-1, <14.10.6
>=15.0-rc-1, <15.2-rc-1
14.10.6
15.2-rc-1

Affected products

  • xwiki xwiki-platform

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.