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CVE-2021-45331

30
FAUCET Score

CVE-2021-45331 is an authentication bypass vulnerability affecting Gitea versions prior to 1.5.0, allowing a malicious actor to gain unauthorized privileges by reusing a captured Time-based One-Time Password (TOTP) code. This critical vulnerability, rated 9.8 CVSS, has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.5.0CPE matchmatch criteria
cpe:2.3:a:gitea:gitea:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.42%
Probability of exploitation in next 30 days
EPSS Percentile
70.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0142 is in the 57th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

audiobookshelfpatch availablevia llm_extracted
axispatch availablevia llm_extracted
extreme_networkspatch availablevia llm_extracted
freebsdpatch availablevia llm_extracted
github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: code.gitea.io/giteaFixed in: 1.5.0
trendmicropatch availablevia llm_extracted

Vendor Advisories (6)

goGHSA-hfmf-q69j-6m5pcritical

Reuse of one time passwords allowed in Gitea

Feb 10, 2022
trendmicrollm-trendmicro-dd7749d9a26b4f73

2FA Token Reuse

axisllm-axis-41135be199bfd885

2FA Token Reuse

audiobookshelfllm-audiobookshelf-71fbe318d2d919f0

2FA Token Reuse

freebsdllm-freebsd-3d92adf2ddf2ebc4

2FA Token Reuse

extreme_networksllm-extreme_networks-84c3dcbef40915c4

2FA Token Reuse

References

blog.gitea.io / 2018/08/gitea-1.5.0-is-released
Release NotesVendor Advisory
github.com / go-gitea/gitea/pull/3878
PatchThird Party Advisory