CVE-2021-45331
Reuse of one time passwords allowed in Gitea
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-45331- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-45331- Updated
- 2026-11-02
EUVDEUVD-2022-1043 No score
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.
- Record
EUVD-2022-1043- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hfmf-q69j-6m5p
Reuse of one time passwords allowed in Gitea
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.
- Record
GHSA-hfmf-q69j-6m5p- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSVALPINE-CVE-2021-45331
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.
- Record
ALPINE-CVE-2021-45331- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
OSV
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.
- Record
CVE-2021-45331- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-hfmf-q69j-6m5p
Reuse of one time passwords allowed in Gitea
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.
- Record
GHSA-hfmf-q69j-6m5p- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSVBIT-gitea-2021-45331 No score
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.
- Record
BIT-gitea-2021-45331- Updated
- 2026-11-02
OSVGO-2022-0315 No score
Reuse of one time passwords allowed in Gitea in code.gitea.io/gitea
Reuse of one time passwords allowed in Gitea in code.gitea.io/gitea
- Record
GO-2022-0315- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
code.gitea.io/giteaGo |
before 1.5.0 | 1.5.0 |
giteaAlpine:v3.16 |
before 1.5.1-r0 | 1.5.1-r0 |
giteaAlpine:v3.17 |
before 1.5.1-r0 | 1.5.1-r0 |
giteaAlpine:v3.18 |
before 1.5.1-r0 | 1.5.1-r0 |
giteaAlpine:v3.19 |
before 1.5.1-r0 | 1.5.1-r0 |
giteaAlpine:v3.20 |
before 1.5.1-r0 | 1.5.1-r0 |
giteaAlpine:v3.21 |
before 1.5.1-r0 | 1.5.1-r0 |
giteaAlpine:v3.22 |
before 1.5.1-r0 | 1.5.1-r0 |
giteaAlpine:v3.23 |
before 1.5.1-r0 | 1.5.1-r0 |
giteaAlpine:v3.24 |
before 1.5.1-r0 | 1.5.1-r0 |
giteaBitnami |
before 1.5.0 | 1.5.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-45331 is a critical vulnerability (CVSS 9.8) in Gitea, published February 9, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.44%, the 73rd percentile. Fixed in code.gitea.io/gitea 1.5.0.