# XWiki Platform web templates vulnerable to reflected XSS in the create document form if name validation is enabled

Advisory record · `GHSA-qcj9-gcpg-4w2w`

- **Identifiers:** `GHSA-qcj9-gcpg-4w2w` · `CVE-2023-45136`
- **State:** Confirmed
- **Severity:** CVSS 9.7 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-79](https://cwe.mitre.org/data/definitions/79.html)
- **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md)
- **Published:** 25 Oct 2023
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 25 Oct 2023, 21:13 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.7: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `org.xwiki.platform:xwiki-platform-web-templates` (Maven): affected `>=12.0-rc-1, <14.10.12 || >=15.0-rc-1, <15.5-rc-1`; fixed in `14.10.12`, `15.5-rc-1`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> XWiki Platform web templates (xwiki-platform-web-templates) from 12.0-rc-1 before 14.10.12, and from 15.0-rc-1 before 15.5-rc-1, have a reflected XSS flaw in the create document form when name validation is enabled, which is off by default. An attacker who gets a user to open a crafted link can act with that user's rights. Upgrade to 14.10.12 or 15.5-rc-1.

Written 2 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 9.7 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.054, the 92nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:18 UTC: First seen by agentprime
- 31 Oct 2026, 14:18 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-qcj9-gcpg-4w2w)

## Sources

- [GitHub Advisory Database: GHSA-qcj9-gcpg-4w2w](https://github.com/advisories/GHSA-qcj9-gcpg-4w2w)
- [OSV: GHSA-qcj9-gcpg-4w2w](https://osv.dev/vulnerability/GHSA-qcj9-gcpg-4w2w)
- <https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qcj9-gcpg-4w2w>
- <https://nvd.nist.gov/vuln/detail/CVE-2023-45136>
- <https://github.com/xwiki/xwiki-platform/commit/ba56fda175156dd35035f2b8c86cbd8ef1f90c2e>
- <https://github.com/xwiki/xwiki-platform>
- <https://jira.xwiki.org/browse/XWIKI-20854>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-qcj9-gcpg-4w2w>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-qcj9-gcpg-4w2w/>. Everything for agents: <https://agentprime.io/llms.txt>.