# EasyAdmin: Stored Cross-Site Scripting (XSS) via uploaded files served inline in FileField and ImageField

Advisory record · `GHSA-8559-gwj3-q37r`

- **Identifiers:** `GHSA-8559-gwj3-q37r` · `CVE-2026-54087` · `PKSA-8yhb-cz5n-f41h`
- **State:** Confirmed
- **Severity:** CVSS 7.6 High
- **Critical:** No
- **Weakness (CWE):** [CWE-79](https://cwe.mitre.org/data/definitions/79.html) · [CWE-434](https://cwe.mitre.org/data/definitions/434.html)
- **Tags:** [Cross-site scripting (XSS)](https://agentprime.io/advisories/tag/xss.md) · [Unrestricted file upload](https://agentprime.io/advisories/tag/file-upload.md)
- **Published:** 14 Jul 2026
- **Updated:** 14 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 14 Jul 2026, 19:51 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `easycorp/easyadmin-bundle` (Packagist): affected `>=5.0.0, <5.0.13`; fixed in `5.0.13`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0040, the 34th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:25 UTC: First seen by agentprime
- 31 Oct 2026, 14:25 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-8559-gwj3-q37r)

## Sources

- [GitHub Advisory Database: GHSA-8559-gwj3-q37r](https://github.com/advisories/GHSA-8559-gwj3-q37r)
- [OSV: GHSA-8559-gwj3-q37r](https://osv.dev/vulnerability/GHSA-8559-gwj3-q37r)
- <https://github.com/EasyCorp/EasyAdminBundle/security/advisories/GHSA-8559-gwj3-q37r>
- <https://github.com/EasyCorp/EasyAdminBundle/commit/8132b2b0ca3876c9261264fa267106a1b2c10a68>
- <https://github.com/EasyCorp/EasyAdminBundle>
- <https://github.com/EasyCorp/EasyAdminBundle/releases/tag/v5.0.13>

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-8559-gwj3-q37r>, 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-8559-gwj3-q37r/>. Everything for agents: <https://agentprime.io/llms.txt>.