CVE-2021-32921

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.

• CWE-362

• http://www.openwall.com/lists/oss-security/2021/05/13/1Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/14/2Mailing List, Mitigation, Third Party Advisory
• https://blog.prosody.im/prosody-0.11.9-released/Release Notes, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2021/06/msg00016.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/06/msg00018.htmlThird Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
• https://security.gentoo.org/glsa/202105-15Third Party Advisory
• https://www.debian.org/security/2021/dsa-4916Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/13/1Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/05/14/2Mailing List, Mitigation, Third Party Advisory
• https://blog.prosody.im/prosody-0.11.9-released/Release Notes, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2021/06/msg00016.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/06/msg00018.htmlThird Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
• https://security.gentoo.org/glsa/202105-15Third Party Advisory
• https://www.debian.org/security/2021/dsa-4916Third Party Advisory

Published

May 13, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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• CVE-2021-32914Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2021-32915Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2021-32917An issue was discovered in Prosody before 0.11.9. The proxy6…5.3
• CVE-2021-32918An issue was discovered in Prosody before 0.11.9. Default se…7.5
• CVE-2021-32919An issue was discovered in Prosody before 0.11.9. The undocu…7.5
• CVE-2021-32920Prosody before 0.11.9 allows Uncontrolled CPU Consumption vi…7.5
• CVE-2021-32923HashiCorp Vault and Vault Enterprise allowed the renewal of …7.4
• CVE-2021-32924Invision Community (aka IPS Community Suite) before 4.6.0 al…8.8
• CVE-2021-32925admin/user_import.php in Chamilo 1.11.x reads XML data witho…6.5
• CVE-2021-32926When an authenticated password change request takes place, t…7.5
• CVE-2021-32927An attacker may be able to inject client-side JavaScript cod…6.1
• CVE-2021-32928The Sentinel LDK Run-Time Environment installer (Versions 7.…9.8