{"id":"CVE-2020-15225","aliases":["GHSA-x7gm-rfgv-w973","PYSEC-2021-64"],"url":"https://o3.security/vulnerability/CVE-2020-15225","summary":"Potential DoS with NumberFilter conversion to integer values.","details":"django-filter is a generic system for filtering Django QuerySets based on user selections. In django-filter before version 2.4.0, automatically generated `NumberFilter` instances, whose value was later converted to an integer, were subject to potential DoS from maliciously input using exponential format with sufficiently large exponents. Version 2.4.0+ applies a `MaxValueValidator` with a a default `limit_value` of 1e50 to the form field used by `NumberFilter` instances. In addition, `NumberFilter` implements the new `get_max_validator()` which should return a configured validator instance to customise the limit, or else `None` to disable the additional validation. Users may manually apply an equivalent validator if they are not able to upgrade.","published":"2021-04-29T21:15:08.490Z","modified":"2026-07-08T06:29:08.323680824Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"django-filter","fixedVersion":"2.4.0"}],"fix":{"url":"https://github.com/carltongibson/django-filter/commit/340cf7a23a2b3dcd7183f6a0d6c383e85b130d2b","label":"carltongibson/django-filter@340cf7a"},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPHENTRHRAYFXYPPBT7JRHZRWILRY44S/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FAT2ZAEF6DM3VFSOHKB7X3ASSHGQHJAK/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVJ7AYU6FUSU3F653YCGW5LFD3IULRSX/"},{"type":"ADVISORY","url":"https://github.com/carltongibson/django-filter/releases/tag/2.4.0"},{"type":"ADVISORY","url":"https://github.com/carltongibson/django-filter/security/advisories/GHSA-x7gm-rfgv-w973"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210604-0010/"},{"type":"FIX","url":"https://github.com/carltongibson/django-filter/commit/340cf7a23a2b3dcd7183f6a0d6c383e85b130d2b"},{"type":"PACKAGE","url":"https://pypi.org/project/django-filter/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T06:29:08.323680824Z"}}