What is CVE-2021-32920?

CVE-2021-32920 is a high vulnerability published on May 13, 2021. Prosody before 0.11.9 allows Uncontrolled CPU Consumption via a flood of SSL/TLS renegotiation requests.

When was CVE-2021-32920 disclosed?

CVE-2021-32920 was first published in the National Vulnerability Database on May 13, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-32920 actively exploited?

CVE-2021-32920 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-32920?

CVE-2021-32920 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-32920?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-32920, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

CVE-2021-32920

HIGHNVD 7.57.5—

7.5

Prosody before 0.11.9 allows Uncontrolled CPU Consumption via a flood of SSL/TLS renegotiation requests.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 91.5%
KEV: Not listed

References (16)

cve@mitrehttp://www.openwall.com/lists/oss-security/2021/05/13/1
cve@mitrehttp://www.openwall.com/lists/oss-security/2021/05/14/2
cve@mitrehttps://blog.prosody.im/prosody-0.11.9-released/
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
cve@mitrehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
cve@mitrehttps://security.gentoo.org/glsa/202105-15
cve@mitrehttps://www.debian.org/security/2021/dsa-4916
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/05/13/1
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/05/14/2
af854a3a-2127-422b-91ae-364da2661108https://blog.prosody.im/prosody-0.11.9-released/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202105-15

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CVE-2021-32920

Published

Last Modified

References (16)

Weakness Classification(1)

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-32920?

Same CWE

CVE-2021-32920

📅 Published

🔄 Last Modified

🔗 References (16)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-32920?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (16)

Frequently asked(5)

Related CVEs(same CWE)