{"action":"Upgrade matrix-sydent to 2.3.0 or later.","affected":[{"fixed":"2.3.0","introduced":"0"}],"component":"matrix-sydent","cve_ids":["CVE-2021-29433"],"ecosystem":"PyPI","epss":0.00927,"exploited":false,"fixed_versions":["2.3.0"],"ghsa_id":"GHSA-pw4v-gr34-2553","id":"tcs_01M5KFTT1EVN9GB7BVGGRFWXBB","modified_at":"2026-09-10T03:49:03.750308427Z","published_at":"2021-04-16T19:53:37Z","references":["https://osv.dev/vulnerability/GHSA-pw4v-gr34-2553","https://github.com/matrix-org/sydent/security/advisories/GHSA-pw4v-gr34-2553","https://nvd.nist.gov/vuln/detail/CVE-2021-29433","https://github.com/matrix-org/sydent/commit/3175fd358ebc2c310eab7a3dbf296ce2bd54c1da","https://github.com/matrix-org/sydent","https://github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-24.yaml","https://pypi.org/project/matrix-sydent"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GHSA-pw4v-gr34-2553","url":"https://osv.dev/vulnerability/GHSA-pw4v-gr34-2553"}],"summary":"Sydent DoS (via resource exhaustion) due to improper input validation"}