{"cve":"CVE-2021-32921","nvd":{"published":"2021-05-13T16:15:08.407","modified":"2026-06-17T03:53:48.247","status":"Modified","description":"An issue was discovered in Prosody before 0.11.9. It does not use a constant-time algorithm for comparing certain secret strings when running under Lua 5.2 or later. This can potentially be used in a timing attack to reveal the contents of secret strings to an attacker.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9},"cwes":["CWE-362"],"references":["http://www.openwall.com/lists/oss-security/2021/05/13/1","http://www.openwall.com/lists/oss-security/2021/05/14/2","https://blog.prosody.im/prosody-0.11.9-released/","https://lists.debian.org/debian-lts-announce/2021/06/msg00016.html","https://lists.debian.org/debian-lts-announce/2021/06/msg00018.html"],"products":["debian:debian_linux","fedoraproject:fedora","prosody:prosody"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-32921","score":0.01601,"percentile":0.75801,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}