Gitea up to 1.25.3 Stopwatch API access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Gitea up to 1.25.3. This impacts an unknown function of the component Stopwatch API. This manipulation causes access control. This vulnerability is registered as CVE-2026-20883. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Gitea up to 1.25.3. Affected by this vulnerability is some unknown functionality of the component Stopwatch API. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality. The summary by CVE is:

Gitea's stopwatch API does not re-validate repository access permissions. After a user's access to a private repository is revoked, they may still view issue titles and repository names through previously started stopwatches.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-20883 since 01/09/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 1.25.4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-4267) and CERT Bund (WID-SEC-2026-0200). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Open Source Gitea

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Gitea 1.25.4
Patch: github.com

Timelineinfo

01/09/2026 CVE reserved
01/23/2026 +14 days Advisory disclosed
01/23/2026 +0 days VulDB entry created
01/24/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-644v-xv3j-xgqg
Status: Confirmed

CVE: CVE-2026-20883 (🔒)
GCVE (CVE): GCVE-0-2026-20883
GCVE (VulDB): GCVE-100-342505
EUVD: 🔒
CERT Bund: WID-SEC-2026-0200 - Gitea: Mehrere Schwachstellen

Entryinfo

Created: 01/23/2026 08:02
Updated: 01/24/2026 07:02
Changes: 01/23/2026 08:02 (57), 01/24/2026 04:39 (7), 01/24/2026 07:02 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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