# CVE-2009-4762: MoinMoin Improper Access Control vulnerability

Source: https://junglewise.ai/threats/cve-2009-4762-moinmoin-improper-access-control-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2010-03-29  
License: CC BY 4.0 with a link back

CVE-2009-4762 · Severity: low · CVSS 3.1 · Published 2010-03-29

MoinMoin 1.7.x before 1.7.3 and 1.8.x before 1.8.3 checks parent ACLs in certain inappropriate circumstances during processing of hierarchical ACLs, which allows remote attackers to bypass intended access restrictions by requesting an item, a different vulnerability than CVE-2008-6603.

Technologies: [moin (PyPI)](https://junglewise.ai/threats/technologies/moin). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2009-4762 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2009-4762 being exploited in the wild.

**How severe is CVE-2009-4762?** Low severity, with a CVSS score of 3.1, published 29 March 2010.

**Which products and versions are affected?** moin (PyPI) ECOSYSTEM:introduced=1.7,fixed=1.7.3,introduced=1.8,fixed=1.8.3, ECOSYSTEM:introduced=1.7.0,fixed=1.7.3.

**Is there a fix for CVE-2009-4762?** Yes. moin (PyPI): upgrade to 1.7.3, 1.8.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2009-4762?** Check whether you run moin (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- moin (PyPI): upgrade to 1.7.3, 1.8.3 or later

  ```sh
  pip install "moin>=1.8.3"
  ```


## Affected products

- moin (PyPI) ECOSYSTEM:introduced=1.7,fixed=1.7.3,introduced=1.8,fixed=1.8.3, ECOSYSTEM:introduced=1.7.0,fixed=1.7.3

## Identifiers

- CVE-2009-4762
- GHSA-jj23-fj2v-m872
- PYSEC-2010-13

## Related threats

- [PYSEC-2026-676 - MoinMoin Cross-site scripting (XSS) vulnerability in the antispam feature](https://junglewise.ai/threats/cve-2009-0312-moinmoin-cross-site-scripting-xss-vulnerability-in-the-antispam)
- [PYSEC-2026-670 - MoinMoin Multiple cross-site scripting (XSS) vulnerabilities](https://junglewise.ai/threats/cve-2009-0260-moinmoin-multiple-cross-site-scripting-xss-vulnerabilities)
- [PYSEC-2026-677 - MoinMoin Improper Access Control](https://junglewise.ai/threats/cve-2008-1099-moinmoin-improper-access-control)
- [PYSEC-2026-672 - MoinMoin Multiple cross-site scripting (XSS) vulnerabilities](https://junglewise.ai/threats/cve-2008-1098-moinmoin-multiple-cross-site-scripting-xss-vulnerabilities)
- [PYSEC-2026-668 - MoinMoin Directory traversal vulnerability](https://junglewise.ai/threats/cve-2008-0782-moinmoin-directory-traversal-vulnerability)