CVE-2025-68939Network attack vector

File-type restriction bypass via unchecked attachment renaming

Published Dec 26, 2025 · Updated Dec 26, 2025

File-type restriction bypass in Gitea before 1.23.0 allows remote authenticated users to rename attachments to forbidden extensions. The issue, comment, and release attachment API handlers wrote new names through repo_model.UpdateAttachment without rechecking the configured allowlist. An issue poster or user with repository write access can bypass instance-level extension restrictions; exploitation requires a nonempty allowlist.

CVSS severity8.2
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

File-type restriction bypass in Gitea before 1.23.0 allows remote authenticated users to rename attachments to forbidden extensions. The issue, comment, and release attachment API handlers wrote new names through repo_model.UpdateAttachment without rechecking the configured allowlist. An issue poster or user with repository write access can bypass instance-level extension restrictions; exploitation requires a nonempty allowlist.

The record

CVE
CVE-2025-68939
Published
Dec 26, 2025
Updated
Dec 26, 2025
Vendor
Gitea
Product
Gitea
Classifications
CWE-424, CAPEC-127, CAPEC-554, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.23.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Gitea · Giteaversion=0 <1.23.0

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
8.2MITRECVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-424Improper Protection of Alternate Path
CAPEC-127Directory Indexing
CAPEC-554Functionality Bypass
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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