# XXE in Apache Standard Taglibs

Advisory record · `GHSA-6x4w-8w53-xrvv`

- **Identifiers:** `GHSA-6x4w-8w53-xrvv` · `CVE-2015-0254`
- **State:** Confirmed
- **Severity:** No CVSS score
- **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:** 14 Sept 2020
- **Updated:** 2 Dec 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 14 Sept 2020, 18:44 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.apache.taglibs:taglibs-standard` (Maven): affected `<1.2.3`; fixed in `1.2.3`
- `org.apache.taglibs:taglibs-standard-impl` (Maven): affected `<1.2.3`; fixed in `1.2.3`

## Machine-written summary

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

> Apache Standard Taglibs (taglibs-standard and taglibs-standard-impl) versions before 1.2.3 are vulnerable. A remote attacker can supply a crafted XSLT extension to the JSTL XML tags x:parse or x:transform, which may allow arbitrary code execution or external XML entity (XXE) attacks. Upgrade both packages to version 1.2.3.

Written 8 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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.12, the 96th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:12 UTC: First seen by agentprime
- 31 Oct 2026, 15:12 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-6x4w-8w53-xrvv)

## Sources

- [GitHub Advisory Database: GHSA-6x4w-8w53-xrvv](https://github.com/advisories/GHSA-6x4w-8w53-xrvv)
- [OSV: GHSA-6x4w-8w53-xrvv](https://osv.dev/vulnerability/GHSA-6x4w-8w53-xrvv)
- <https://nvd.nist.gov/vuln/detail/CVE-2015-0254>
- <https://access.redhat.com/errata/RHSA-2016:1376>
- <https://lists.apache.org/thread.html/8a20e48acb2a40be5130df91cf9d39d8ad93181989413d4abcaa4914@%3Cdev.tomcat.apache.org%3E>
- <https://lists.apache.org/thread.html/f8e0814e11c7f21f42224b6de111cb3f5e5ab5c15b78924c516d4ec2@%3Cdev.tomcat.apache.org%3E>
- <https://lists.apache.org/thread.html/r6c93d8ade3788dbc00f5a37238bc278e7d859f2446b885460783a16f@%3Cpluto-dev.portals.apache.org%3E>
- <https://lists.apache.org/thread.html/rc1686f6196bb9063bf26577a21b8033c19c1a30e5a9159869c8f3d38@%3Cpluto-dev.portals.apache.org%3E>
- <https://lists.apache.org/thread.html/re3b72cbb13e1dfe85c4a06959a3b6ca6d939b407ecca80db12b54220@%3Cdev.tomcat.apache.org%3E>
- <https://lists.apache.org/thread.html/rf1179e6971bc46f0f68879a9a10cc97ad4424451b0889aeef04c8077@%3Cpluto-scm.portals.apache.org%3E>
- <https://lists.apache.org/thread.html/rfc2bfd99c340dafd501676693cd889c1f9f838b97bdd0776a8f5557d@%3Cdev.tomcat.apache.org%3E>
- <https://www.oracle.com/security-alerts/cpuapr2020.html>
- <http://lists.opensuse.org/opensuse-updates/2015-10/msg00033.html>
- <http://mail-archives.apache.org/mod_mbox/tomcat-taglibs-user/201502.mbox/%3C82207A16-6348-4DEE-877E-F7B87292576A%40apache.org%3E>

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-6x4w-8w53-xrvv>, 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-6x4w-8w53-xrvv/>. Everything for agents: <https://agentprime.io/llms.txt>.