Is CVE-2021-45331 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 1%.

What products does CVE-2021-45331 affect?

Tracked products affected include Gitea. Check the version you run to see whether it is affected.

How do I fix CVE-2021-45331?

Apply the vendor fix promptly. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2021-45331

Q: What is CVE-2021-45331?

CVE-2021-45331 is a critical-severity software vulnerability (Improper authentication) with a CVSS score of 9.8. An Authentication Bypass vulnerability exists in Gitea before 1.5.0, which could let a malicious user gain privileges. If captured, the TOTP code for the 2FA can be submitted correctly more than once.

CRITICAL severity · CVSS 9.8 · Improper authentication

9.8CVSS CRITICAL

Summary

An Authentication Bypass vulnerability exists in Gitea before 1.5.0, which could let a malicious user gain privileges. If captured, the TOTP code for the 2FA can be submitted correctly more than once.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)1%

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

Affected products we track (1)

Gitea

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://github.com/go-gitea/gitea/pull/3878 ↗

Additional information

NVD record
https://github.com/go-gitea/gitea/pull/3878Patch
https://blog.gitea.io/2018/08/gitea-1.5.0-is-released/Advisory