CVE-2022-24976

Name: CVE-2022-24976
Creator: NVD / NIST
Published: 2022-02-14T12:15:27.68+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 1.79%

Last modified Jun 17, 2026

CVE-2022-24976 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Atheme IRC Services before 7.2.12, when used in conjunction with InspIRCd, allows authentication bypass by ending an IRC handshake at a certain point during a challenge-response login sequence.. EPSS estimates a 1.79% chance of exploitation in the next 30 days.

Description

Atheme IRC Services before 7.2.12, when used in conjunction with InspIRCd, allows authentication bypass by ending an IRC handshake at a certain point during a challenge-response login sequence.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

1.79%

75.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Atheme	Atheme	>= 7.2.0, < 7.2.12

References

https://github.com/atheme/atheme/commit/4e664c75d0b280a052eb8b5e81aa41944e593c52Patch, Third Party Advisory
https://github.com/atheme/atheme/compare/v7.2.11...v7.2.12Patch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/01/30/4Exploit, Mailing List, Third Party Advisory
https://github.com/atheme/atheme/commit/4e664c75d0b280a052eb8b5e81aa41944e593c52Patch, Third Party Advisory
https://github.com/atheme/atheme/compare/v7.2.11...v7.2.12Patch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/01/30/4Exploit, Mailing List, Third Party Advisory

Timeline

Published: Feb 14, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-24976?

Atheme IRC Services before 7.2.12, when used in conjunction with InspIRCd, allows authentication bypass by ending an IRC handshake at a certain point during a challenge-response login sequence.

How severe is CVE-2022-24976?

CVE-2022-24976 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.79% probability of exploitation in the next 30 days.

How do I fix CVE-2022-24976?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-24976?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST