How severe is GHSA-fp36-mjw5-fmgx?

GHSA-fp36-mjw5-fmgx has a CVSS score of 5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by GHSA-fp36-mjw5-fmgx?

GHSA-fp36-mjw5-fmgx affects the following packages: org.xwiki.platform:xwiki-platform-web-templates (Maven). Ecosystems affected: Maven.

How do I fix GHSA-fp36-mjw5-fmgx?

Update org.xwiki.platform:xwiki-platform-web-templates to 14.10.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fp36-mjw5-fmgx is resolved across your whole dependency graph.

How do I detect GHSA-fp36-mjw5-fmgx in my Maven dependencies?

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

How do I mitigate GHSA-fp36-mjw5-fmgx if there is no patch (or I can't update yet)?

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.

Is GHSA-fp36-mjw5-fmgx actively exploited in the wild?

Yes. There are 3 known exploit references for GHSA-fp36-mjw5-fmgx, including 3 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-fp36-mjw5-fmgx?

GHSA-fp36-mjw5-fmgx has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 52th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-fp36-mjw5-fmgx?

GHSA-fp36-mjw5-fmgx is classified as CWE-284 (CWE-284). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-fp36-mjw5-fmgx published, and has it been updated?

GHSA-fp36-mjw5-fmgx was published on April 20, 2023 and was last updated on November 8, 2023. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

xwiki-platform-web-templates allows users to be created even when registration is disabled without validation via template macroGHSA-fp36-mjw5-fmgx

MEDIUM

GHSA-fp36-mjw5-fmgx is a medium-severity (CVSS 5) CWE-284 vulnerability in org.xwiki.platform:xwiki-platform-web-templates. 3 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for org.xwiki.platform:xwiki-platform-web-templates — see the affected versions and patch details below.

Also known asCVE-2023-29513

Published

Apr 20, 2023

Updated

Nov 8, 2023

Affected

1 pkg

Patched

1 / 1

Exploits

3 known

Exploitation data as of Nov 8, 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.

Exploitation and automatability from CISA’s SSVC triage for GHSA-fp36-mjw5-fmgx.

EPSS Exploitation Probability

via FIRST.org ↗

0.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs52th percentile — riskier than 52% of all scored CVEsHighest risk

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

1 pkg affected

☕org.xwiki.platform:xwiki-platform-web-templates

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

If a guest has view rights on any document, it's possible to create a new user using the distribution/firstadminuser.wiki in the wrong context.

To reproduce:

On a wiki with view rights for guests but user registration disabled, open as guest <server>/xwiki/bin/view/Main?sheet=CKEditor.HTMLConverter&language=en&sourceSyntax=xwiki%2F2.1&stripHTMLEnvelope=true&fromHTML=false&toHTML=true&text=%7B%7Btemplate+name%3D%22distribution%2Ffirstadminuser.wiki%22+%2F%7D%7D where <server> is the URL of your XWiki installation.
Enter username and password of your choice.
Click "Register and login"

Patches

The vulnerability has been patched in XWiki 15.0-rc-1 and 14.10.1.

Workarounds

There is no known workaround other than upgrading.

References

https://jira.xwiki.org/browse/XWIKI-19852 https://jira.xwiki.org/browse/XWIKI-20400

For more information

If you have any questions or comments about this advisory:

Open an issue in Jira XWiki.org
Email us at Security Mailing List

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.xwiki.platform:xwiki-platform-web-templates`	≥ 8.0-rc-1&&< 14.10.1	14.10.1`org.xwiki.platform:xwiki-platform-web-templates:14.10.1`

Affected Products

1 product · 1 configurations

Application

xwikixwiki

< 14.10.1

range

Exploits & PoCs

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 …

github.comNVDApr 2023

Report on jira.xwiki.org

jira.xwiki.orgNVDApr 2023

Report on jira.xwiki.org

jira.xwiki.orgNVDApr 2023

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.xwiki.platform:xwiki-platform-web-templates, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.xwiki.platform:xwiki-platform-web-templates to 14.10.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fp36-mjw5-fmgx is resolved across your whole dependency graph.
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 If a guest has view rights on any document, it's possible to create a new user using the `distribution/firstadminuser.wiki` in the wrong context. To reproduce: * On a wiki with view rights for guests but user registration disabled, open as guest <server>/xwiki/bin/view/Main?sheet=CKEditor.HTMLConverter&language=en&sourceSyntax=xwiki%2F2.1&stripHTMLEnvelope=true&fromHTML=false&toHTML=true&text=%7B%7Btemplate+name%3D%22distribution%2Ffirstadminuser.wiki%22+%2F%7D%7D where <server> is the URL of your XWiki installation. * Enter username and password of your choice. * Click "Register

O3 Security · Impact-Aware SCA

Is GHSA-fp36-mjw5-fmgx in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

CWE Classification

CWE-284CWE-284

Weaponization

No Nuclei template or Metasploit module yet. 3 public proof-of-concept references are listed on this page.

OpenSSF Scorecard

Package health score

xwiki-platform

6.0/10

Code-Review5/10

Maintained10/10

Branch-ProtectionN/A

Assessed Nov 2, 2026

Timeline

Disclosed

Apr 20, 2023

First exploit

Apr 28, 2023

Last updated

Nov 8, 2023

Identifiers

GHSA-fp36-mjw5-fmgx

References

Advisorynvd.nist.gov · CVE 2023 29513 Webgithub.com · GHSA fp36 mjw5 fmgx Webjira.xwiki.org · XWIKI 19852 Webjira.xwiki.org · XWIKI 20400 Packagegithub.com · xwiki platform

Related vulnerabilities

This CVE is medium severity; 8 of 8 other CVEs affecting xwiki-platform-web-templates are rated as high or higher (top: critical).

CVE-2026-40105CVE-2026-24128CVE-2025-66472CVE-2025-32430CVE-2024-43401CVE-2024-41947CVE-2023-45137CVE-2023-45135

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedNov 8, 2023

xwiki-platform-web-templates allows users to be created even when registration is disabled without validation via template macroGHSA-fp36-mjw5-fmgx

Exploitation Status

Proof-of-concept exploit code exists

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Impact

Patches

Workarounds

References

For more information

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is GHSA-fp36-mjw5-fmgx in your dependencies?