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CRITICAL severity

XWiki Platform's Groovy jobs check the wrong author, allowing remote code executionGHSA-8xhr-x3v8-rghj

CRITICALFix: xwiki/xwiki-platform@fcdcfed

GHSA-8xhr-x3v8-rghj is a critical-severity (CVSS 9) CWE-284 vulnerability in org.xwiki.platform:xwiki-platform-scheduler-api. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for org.xwiki.platform:xwiki-platform-scheduler-api — see the affected versions and patch details below.

Also known asCVE-2023-40573
Published
Updated
Affected
3 pkgs
Patched
2 / 3
Exploits
1 known
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
  • A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA’s SSVC triage for GHSA-8xhr-x3v8-rghj.

EPSS Exploitation Probability

via FIRST.org ↗
1.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs65th percentile — riskier than 65% of all scored CVEsHighest risk
0.21%1.61%3.02%4.43%3.5%1.1%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

3 pkgs affected
☕org.xwiki.platform:xwiki-platform-scheduler-api☕com.xpn.xwiki.platform.plugins:xwiki-plugin-scheduler☕org.xwiki.platform:xwiki-platform-scheduler-api

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Impact

XWiki supports scheduled jobs that contain Groovy scripts. Currently, the job checks the content author of the job for programming right. However, modifying or adding a job script to a document doesn't modify the content author. Together with a CSRF vulnerability in the job scheduler, this can be exploited for remote code execution by an attacker with edit right on the wiki.

For successful exploitation, the needs to have edit right on a document whose content has last been changed by a user with programming right. This could be the user profile for users created by admins. In this document, the attacker can create an object of class XWiki.SchedulerJobClass using the object editor. By setting job class to com.xpn.xwiki.plugin.scheduler.GroovyJob, cron expression to 0 0/5 * * * ? and job script to services.logging.getLogger("foo").error("Job content executed"), the attacker can create a job. Now this job just needs to be triggered or scheduled. This can be achieved by embedding an image with the following XWiki syntax in any document that is visited by an admin: [[image:path:/xwiki/bin/view/Scheduler/?do=trigger&which=Attacker.Document]] where Attacker.Document is the document that has been prepared by the attacker. If the attack is successful, an error log entry with "Job content executed" will be produced.

Patches

This vulnerability has been patched in XWiki 14.10.9 and 15.4RC1.

Workarounds

There is no workaround.

References

Affected Packages

3 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.xwiki.platform:xwiki-platform-scheduler-apiall versions14.10.9org.xwiki.platform:xwiki-platform-scheduler-api:14.10.9
☕Mavencom.xpn.xwiki.platform.plugins:xwiki-plugin-scheduler≥ 1.3No fix
☕Mavenorg.xwiki.platform:xwiki-platform-scheduler-api≥ 15.0-rc-1&&< 15.4-rc-115.4-rc-1org.xwiki.platform:xwiki-platform-scheduler-api:15.4-rc-1

Affected Products

1 product · 9 configurations
Application
xwikixwiki
< 14.10.9
4 versions
15.015.115.215.3
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

XWiki Platform is a generic wiki platform offering runtime services for …

jira.xwiki.orgNVDSep 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.xwiki.platform:xwiki-platform-scheduler-api, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.xwiki.platform:xwiki-platform-scheduler-api to 14.10.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8xhr-x3v8-rghj is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

### Impact XWiki supports scheduled jobs that contain Groovy scripts. Currently, the job checks the content author of the job for programming right. However, modifying or adding a job script to a document doesn't modify the content author. Together with a CSRF vulnerability in the job scheduler, this can be exploited for remote code execution by an attacker with edit right on the wiki. For successful exploitation, the needs to have edit right on a document whose content has last been changed by a user with programming right. This could be the user profile for users created by admins. In this
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