How severe is CVE-2023-35153?

CVE-2023-35153 has a CVSS score of 9/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-35153?

CVE-2023-35153 affects the following packages: org.xwiki.platform:xwiki-platform-appwithinminutes-ui (Maven), org.xwiki.platform:xwiki-platform-appwithinminutes-ui (Maven), org.xwiki.platform:xwiki-platform-appwithinminutes-ui (Maven). Ecosystems affected: Maven.

How do I fix CVE-2023-35153?

Update org.xwiki.platform:xwiki-platform-appwithinminutes-ui to 14.4.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-35153 is resolved across your whole dependency graph.

How do I detect CVE-2023-35153 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-appwithinminutes-ui, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2023-35153 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2023-35153 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2023-35153, including 1 in-the-wild exploitation 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 CVE-2023-35153?

CVE-2023-35153 has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 55th 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 CVE-2023-35153?

CVE-2023-35153 is classified as Cross-site Scripting (XSS) (CWE-79), CWE-80 (CWE-80). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2023-35153 published, and has it been updated?

CVE-2023-35153 was published on June 23, 2023 and was last updated on October 28, 2026. 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

CRITICAL severity

CVE-2023-35153 — xwiki-platform-appwithinm…

CRITICALFix: xwiki/xwiki-platform@1b87fec

CVE-2023-35153 is a critical-severity (CVSS 9) Cross-site Scripting (XSS) vulnerability in org.xwiki.platform:xwiki-platform-appwithinminutes-ui. 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-appwithinminutes-ui — see the affected versions and patch details below.

XWiki Platform vulnerable to stored cross-site scripting in ClassEditSheet page via name parameters

Also known asGHSA-4wc6-hqv9-qc97

Published

Jun 23, 2023

Updated

Oct 28, 2026

Affected

3 pkgs

Patched

3 / 3

Exploits

1 known

Exploitation data as of Nov 5, 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 CVE-2023-35153.

EPSS Exploitation Probability

via FIRST.org ↗

0.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs55th percentile — riskier than 55% 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

3 pkgs affected

☕org.xwiki.platform:xwiki-platform-appwithinminutes-ui☕org.xwiki.platform:xwiki-platform-appwithinminutes-ui☕org.xwiki.platform:xwiki-platform-appwithinminutes-ui

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

A stored XSS can be exploited by users with edit rights by adding a AppWithinMinutes.FormFieldCategoryClass class on a page and setting the payload on the page title. Then, any user visiting /xwiki/bin/view/AppWithinMinutes/ClassEditSheet executes the payload.

See https://jira.xwiki.org/browse/XWIKI-20365 for me details.

Patches

The issue has been patched on XWiki 14.4.8, 14.10.4, and 15.0 ?

Workarounds

The issue can be fixed by updating AppWithinMinutes.ClassEditSheet with this patch.

References

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

Attribution

This vulnerability has been reported on Intigriti by René de Sain @renniepak.

Affected Packages

3 total 3 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.xwiki.platform:xwiki-platform-appwithinminutes-ui`	≥ 5.4.4&&< 14.4.8	14.4.8`org.xwiki.platform:xwiki-platform-appwithinminutes-ui:14.4.8`
☕Maven	`org.xwiki.platform:xwiki-platform-appwithinminutes-ui`	≥ 14.5&&< 14.10.4	14.10.4`org.xwiki.platform:xwiki-platform-appwithinminutes-ui:14.10.4`
☕Maven	`org.xwiki.platform:xwiki-platform-appwithinminutes-ui`	≥ 15.0-rc-1&&< 15.0	15.0`org.xwiki.platform:xwiki-platform-appwithinminutes-ui:15.0`

Affected Products

1 product · 3 configurations

Application

xwikixwiki

≥ 14.10 && < 14.10.4

1 version

15.0

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. Starting in version 5.4.4 and…

jira.xwiki.orgNVDJun 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-appwithinminutes-ui, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.xwiki.platform:xwiki-platform-appwithinminutes-ui to 14.4.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-35153 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### Impact A stored XSS can be exploited by users with edit rights by adding a `AppWithinMinutes.FormFieldCategoryClass` class on a page and setting the payload on the page title. Then, any user visiting `/xwiki/bin/view/AppWithinMinutes/ClassEditSheet` executes the payload. See https://jira.xwiki.org/browse/XWIKI-20365 for me details. ### Patches The issue has been patched on XWiki 14.4.8, 14.10.4, and 15.0 ? ### Workarounds The issue can be fixed by updating `AppWithinMinutes.ClassEditSheet` with this [patch](https://github.com/xwiki/xwiki-platform/commit/1b87fec1e5b5ec00b7a8c3c3f94f6c5e2