# GeoServer style upload functionality vulnerable to XML External Entity (XXE) injection

Advisory record · `GHSA-mcmc-c59m-pqq8`

- **Identifiers:** `GHSA-mcmc-c59m-pqq8` · `CVE-2023-26043` · `PYSEC-2023-15`
- **State:** Confirmed
- **Severity:** CVSS 6.5 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-611](https://cwe.mitre.org/data/definitions/611.html)
- **Tags:** [XML external entities (XXE)](https://agentprime.io/advisories/tag/xxe.md)
- **Published:** 30 Aug 2024
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 30 Aug 2024, 18:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `geonode` (PyPI): affected `<4.0.3`; fixed in `4.0.3`

## Machine-written summary

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

> GeoNode versions before 4.0.3 are affected by an XML External Entity (XXE) injection in the style upload functionality for GeoServer datasets. An authenticated user, including a non-privileged account, can upload a crafted style file that causes the server to resolve external entities and return the contents of local files. Upgrade to GeoNode 4.0.3 or later, which contains the fix.

Written 5 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

- 6.5 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0084, the 57th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:35 UTC: First seen by agentprime
- 31 Oct 2026, 14:35 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-mcmc-c59m-pqq8)

## Sources

- [GitHub Advisory Database: GHSA-mcmc-c59m-pqq8](https://github.com/advisories/GHSA-mcmc-c59m-pqq8)
- [OSV: GHSA-mcmc-c59m-pqq8](https://osv.dev/vulnerability/GHSA-mcmc-c59m-pqq8)
- <https://github.com/GeoNode/geonode/security/advisories/GHSA-mcmc-c59m-pqq8>
- <https://nvd.nist.gov/vuln/detail/CVE-2023-26043>
- <https://github.com/GeoNode/geonode/commit/2fdfe919f299b21f1609bf898f9dcfde58770ac0>
- <https://github.com/GeoNode/geonode>
- <https://github.com/pypa/advisory-database/tree/main/vulns/geonode/PYSEC-2023-15.yaml>

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-mcmc-c59m-pqq8>, 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-mcmc-c59m-pqq8/>. Everything for agents: <https://agentprime.io/llms.txt>.