An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrar
An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | mailman | < 3.3.5 | 3.3.5 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-34337
- https://github.com/pypa/advisory-database/tree/main/vulns/mailman/PYSEC-2023-22.yaml
- https://gitlab.com/mailman/mailman
- https://gitlab.com/mailman/mailman/-/commit/e4a39488c4510fcad8851217f10e7337a196bb51
- https://gitlab.com/mailman/mailman/-/issues/911
- https://gitlab.com/mailman/mailman/-/tags
- https://github.com/advisories/GHSA-2jg5-xgvv-4wq7
- CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-208- Platform
- Python (PyPI)
- Package
mailman- Disclosed
- 15.04.2023
- Updated
- 11.10.2026 12:19
Sources and licenses
OSV / GitHub Advisory Database - GHSA-2jg5-xgvv-4wq7 - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2023-22 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: mailman
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 09.2018 04.2023
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 4
Disclosures per year
- 2018: 1
- 2019: 0
- 2020: 0
- 2021: 1
- 2022: 3
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 0
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An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrar this entry
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