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CVE

CVE-2023-29209

XWiki Commons are technical libraries common to several other top level XWiki projects. Any user with view rights on com

XWiki Commons are technical libraries common to several other top level XWiki projects. Any user with view rights on commonly accessible documents including the legacy notification activity macro can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping of the macro parameters of the legacy notification activity macro.

This macro is installed by default in XWiki. The vulnerability can be exploited via every wiki page that is editable including the user's profile, but also with just view rights using the HTMLConverter that is part of the CKEditor integration which is bundled with XWiki. The vulnerability has been patched in XWiki 13.10.11, 14.4.7 and 14.10.

CRITICAL · CVSS 9.9 EPSS 0.18932
Act now
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 5% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
▤

Affected Products & Versions

3
xwiki>= 10.9 and < 13.10.11
xwiki>= 14.4.0 and < 14.4.7
xwiki>= 14.8 and < 14.10
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Maven org.xwiki.platform:xwiki-platform-legacy-notification-activitymacro CRITICAL fixed in 13.10.11
⚠

Public Exploits & PoCs

2
pocgithub.com · GHSA-9pc2-x9qf-7j2qgithub.com
pocjira.xwiki.org · XWIKI-20258jira.xwiki.org
▣

Scoring & Timeline

9.9
CRITICAL · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Apr 2023 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/xwiki/xwiki-platform/commit/94392490884635c028199275db059a4f471e57bcPatch
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