# Jython Improper Access Restrictions vulnerability

Advisory record · `GHSA-9347-9w64-q5wp`

- **Identifiers:** `GHSA-9347-9w64-q5wp` · `CVE-2013-2027`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **Weakness (CWE):** [CWE-281](https://cwe.mitre.org/data/definitions/281.html)
- **Tags:** [CWE-281](https://agentprime.io/advisories/tag/cwe-281.md)
- **Published:** 14 May 2022
- **Updated:** 2 Dec 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 14 May 2022, 02:05 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.python:jython-standalone` (Maven): affected `<2.7.2b3`; fixed in `2.7.2b3`

## Machine-written summary

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

> Jython (org.python:jython-standalone) versions before 2.7.2b3 use the current umask to set permissions on class cache files. A local user could bypass intended access restrictions on those files through unspecified means. Upgrade to jython-standalone 2.7.2b3 or later.

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:** 0.0043, the 37th percentile, on 8 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-9347-9w64-q5wp)

## Sources

- [GitHub Advisory Database: GHSA-9347-9w64-q5wp](https://github.com/advisories/GHSA-9347-9w64-q5wp)
- [OSV: GHSA-9347-9w64-q5wp](https://osv.dev/vulnerability/GHSA-9347-9w64-q5wp)
- <https://nvd.nist.gov/vuln/detail/CVE-2013-2027>
- <https://github.com/jython/frozen-mirror/commit/053949e66d307168fd70b39725f4d3e6b642acc1>
- <https://bugzilla.redhat.com/show_bug.cgi?id=947949>
- <https://github.com/jython/frozen-mirror/blob/b8d7aa4cee50c0c0fe2f4b235dd62922dd0f3f99/NEWS#L25C8-L25C15>
- <http://advisories.mageia.org/MGASA-2015-0096.html>
- <http://lists.opensuse.org/opensuse-updates/2015-02/msg00055.html>
- <http://www.mandriva.com/security/advisories?name=MDVSA-2015:158>
- <http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html>

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-9347-9w64-q5wp>, 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-9347-9w64-q5wp/>. Everything for agents: <https://agentprime.io/llms.txt>.