{"id":"CVE-2023-34457","aliases":["GHSA-x456-3ccm-m6j4","PYSEC-2023-108"],"url":"https://o3.security/vulnerability/CVE-2023-34457","summary":"MechanicalSoup vulnerable to malicious web server reading arbitrary files on client using file input inside HTML form","details":"MechanicalSoup is a Python library for automating interaction with websites. Starting in version 0.2.0 and prior to version 1.3.0, a malicious web server can read arbitrary files on the client using a `<input type=\"file\" ...>` inside HTML form. All users of MechanicalSoup's form submission are affected, unless they took very specific (and manual) steps to reset HTML form field values. Version 1.3.0 contains a patch for this issue.","published":"2023-07-05T19:25:35.966Z","modified":"2026-07-15T01:48:50.673094551Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"PyPI","name":"mechanicalsoup","fixedVersion":"1.3.0"}],"fix":{"url":"https://github.com/MechanicalSoup/MechanicalSoup/commit/d57c4a269bba3b9a0c5bfa20292955b849006d9e","label":"MechanicalSoup/MechanicalSoup@d57c4a2"},"references":[{"type":"WEB","url":"https://github.com/MechanicalSoup/MechanicalSoup/releases/tag/v1.3.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/34xxx/CVE-2023-34457.json"},{"type":"ADVISORY","url":"https://github.com/MechanicalSoup/MechanicalSoup/security/advisories/GHSA-x456-3ccm-m6j4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-34457"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230803-0005/"},{"type":"FIX","url":"https://github.com/MechanicalSoup/MechanicalSoup/commit/d57c4a269bba3b9a0c5bfa20292955b849006d9e"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:48:50.673094551Z"}}