{"id":"CVE-2020-25074","aliases":["GHSA-52q8-877j-gghq","PYSEC-2020-67"],"title":"MoinMoin vulnerable to remote code execution via cache action","summary":"MoinMoin vulnerable to remote code execution via cache action","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"moin","product":"moin","ecosystem":"pip","affected":["moin < 1.9.11"],"patched":["moin 1.9.11"],"published":"2020-11-11","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:48:35.542355415Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-52q8-877j-gghq","references":[{"url":"https://github.com/moinwiki/moin-1.9/security/advisories/GHSA-52q8-877j-gghq"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-25074"},{"url":"https://github.com/moinwiki/moin-1.9/commit/6b96a9060069302996b5af47fd4a388fc80172b7"},{"url":"https://github.com/moinwiki/moin"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/moin/PYSEC-2020-67.yaml"},{"url":"https://lists.debian.org/debian-lts-announce/2020/11/msg00020.html"},{"url":"https://pypi.org/project/moin"},{"url":"https://www.debian.org/security/2020/dsa-4787"},{"url":"http://moinmo.in/SecurityFixes"}],"tags":["osv","pip"],"epss":0.06551,"epssPercentile":0.93502,"ingestedAt":"2026-09-12T03:13:01.656Z","slug":"CVE-2020-25074","body":"## Overview\n\n### Impact\nThe cache action in action/cache.py allows directory traversal through a crafted HTTP request. An attacker who can upload attachments to the wiki can use this to achieve remote code execution.\n\n### Patches\nUsers are strongly advised to upgrade to a patched version.\n\nMoinMoin Wiki 1.9.11 has the necessary fixes and also contains other important fixes.\n\n### Workarounds\nIt is not advised to work around this, but to upgrade MoinMoin to a patched version.\n\nThat said, a work around via disabling the `cache` or the `AttachFile` action might be possible.\n\nAlso, it is of course helpful if you give `write` permissions (which include uploading attachments) only to trusted users.\n\n### Credits\n\nThis vulnerability was discovered by Michael Chapman.\n\n### For more information\nIf you have any questions or comments about this advisory, email me at [twaldmann@thinkmo.de](mailto:twaldmann@thinkmo.de).\n\n## Affected packages\n\n- `moin < 1.9.11`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `moin 1.9.11`","depth":"twilight","depthScore":50,"depthScoreParts":{"impact":48.4,"likelihood":1.3,"exploitation":0,"ransomware":0},"changes":[]}