XWiki Platform vulnerable to reflected cross-site scripting via delattachment action (CVE-2023-35157) | HOL Guard CVE

High · CVSS 8.4CVE-2023-35157GHSA-PHWM-87RG-27QQ

XWiki Platform vulnerable to reflected cross-site scripting via delattachment action

Answer in brief

CVE-2023-35157 records a High severity (CVSS 8.4) vulnerability in XWiki Platform vulnerable to reflected cross-site scripting via delattachment action. The current sources do not mark it as known exploited. The current feed maps org.xwiki.platform:xwiki-platform-oldcore (maven), org.xwiki.platform:xwiki-platform-oldcore (maven). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 22, 2023Updated Sep 10, 2026Source checked Sep 10, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.4
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps org.xwiki.platform:xwiki-platform-oldcore (maven), org.xwiki.platform:xwiki-platform-oldcore (maven). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
org.xwiki.platform:xwiki-platform-oldcoremaven	>=3.2-milestone-3 <14.10.6	14.10.6
org.xwiki.platform:xwiki-platform-oldcoremaven	>=15.0-rc-0 <15.1-rc-1	15.1-rc-1

Recommended response

Check inventory. Check lockfiles and deployed manifests for org.xwiki.platform:xwiki-platform-oldcore, org.xwiki.platform:xwiki-platform-oldcore.
Review the reported fix. Update org.xwiki.platform:xwiki-platform-oldcore to 14.10.6; org.xwiki.platform:xwiki-platform-oldcore to 15.1-rc-1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jun 22, 2023
Evidence: source:osv:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:record
First seen by HOL
Sep 10, 2026

Sources and claim methodology

Upstream source description

### Impact It's possible to perform an XSS by forging a request to a delete attachment action with a specific attachment name. Now this XSS can be exploited only if the attacker knows the CSRF token of the user, or if the user ignores the warning about the missing CSRF token. ### Patches The vulnerability has been patched in XWiki 15.1-rc-1 and XWiki 14.10.6. ### Workarounds There's no workaround for this other than upgrading XWiki. ### References * Jira ticket: https://jira.xwiki.org/browse/XWIKI-20339 * Commit containing the fix: https://github.com/xwiki/xwiki-platform/commit/35e9073ffec567861e0abeea072bd97921a3decf ### For more information If you have any questions or comments about this advisory: * Open an issue in [Jira XWiki.org](https://jira.xwiki.org/) * Email us at [Security Mailing List](mailto:[email protected])

Quoted source text, attributed separately from HOL analysis.