# Liferay Portal Reflected XSS in CKeditor 4.21.0 endpoint

Advisory record · `GHSA-3h7r-4xxj-3mfm`

- **Identifiers:** `GHSA-3h7r-4xxj-3mfm` · `CVE-2025-43761`
- **State:** Confirmed
- **Severity:** CVSS 6.9 Medium
- **Critical:** No
- **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:** 22 Aug 2025
- **Updated:** 25 Aug 2025
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 22 Aug 2025, 21:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `com.liferay:com.liferay.frontend.editor.ckeditor.web` (Maven): affected `<5.0.107`; fixed in `5.0.107`
- `com.liferay:com.liferay.frontend.js.dependencies.web` (Maven): affected `<1.0.25`; fixed in `1.0.25`
- `liferay-ckeditor` (npm): affected `<4.21.0-liferay.10`; fixed in `4.21.0-liferay.10`

## 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

- 6.9 Medium, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N`, from CNA (Liferay)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0021, the 11th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 22 Aug 2025. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-3h7r-4xxj-3mfm](https://github.com/advisories/GHSA-3h7r-4xxj-3mfm)
- [OSV: GHSA-3h7r-4xxj-3mfm](https://osv.dev/vulnerability/GHSA-3h7r-4xxj-3mfm)
- <https://nvd.nist.gov/vuln/detail/CVE-2025-43761>
- <https://github.com/liferay/liferay-portal/commit/4b638ee704340426d806da8ab3d0f92b4be7a0da>
- <https://github.com/liferay/liferay-portal>
- <https://liferay.atlassian.net/browse/LPE-18163>
- <https://liferay.dev/portal/security/known-vulnerabilities/-/asset_publisher/jekt/content/CVE-2025-43761>

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-3h7r-4xxj-3mfm>, 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-3h7r-4xxj-3mfm/>. Everything for agents: <https://agentprime.io/llms.txt>.