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Fencer Vulns
critical 9.9

CVE-2023-29516 in the critical feed json

Code injection from view right on XWiki.AttachmentSelector in xwiki-platform

published 2023-04-18 3 y ago modified 2026-09-10 1 mo ago also GHSA-3989-4c6x-725f , EUVD-2023-1172

cvss
9.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
65.9%
EPSS 65.9% chance of exploitation in 30 days, percentile 99.2%
public exploits
0
none known

Summary

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Any user with view rights on `XWiki.AttachmentSelector` can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping in the "Cancel and return to page" button. This page is installed by default. This vulnerability has been patched in XWiki 15.0-rc-1, 14.10.1, 14.4.8, and 13.10.11. There are no known workarounds for this vulnerability.

Patch / fix

  • maven org.xwiki.platform:xwiki-platform-attachment-ui 13.10.11, 14.4.8, 14.10.1
  • xwiki xwiki 13.10.11, 14.4.8, 14.10.1

CISA SSVC

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

Exploit prediction

65.87% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-3989-4c6x-725f referenced PoC, tagged "exploit" by a source, unverified
  • jira.xwiki.org https://jira.xwiki.org/browse/XWIKI-20275 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

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

Affected packages

ecosystem package affected fixed in
maven org.xwiki.platform:xwiki-platform-attachment-ui
>=2.0-rc-2, <13.10.11
>=14.0-rc-1, <14.4.8
>=14.5, <14.10.1
13.10.11
14.4.8
14.10.1

Affected products

  • xwiki xwiki-platform

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
  • CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code

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.