CVE-2024-39303: Weblate vulnerabler to improper sanitization of project backups

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-01 · updated 2026-06-17
Weakness: CWE-73

Description

Weblate is a web based localization tool. Prior to version 5.6.2, Weblate didn't correctly validate filenames when restoring project backup. It may be possible to gain unauthorized access to files on the server using a crafted ZIP file. This issue has been addressed in Weblate 5.6.2. As a workaround, do not allow untrusted users to create projects.

Affected products

WeblateOrg weblate: from 4.14 before 5.6.2 — fixed in 5.6.2

How to fix

Upgrade to a fixed version: WeblateOrg weblate 5.6.2. Check the vendor advisory for mitigations.

References

https://github.com/WeblateOrg/weblate/commit/b6a7eace155fa0feaf01b4ac36165a9c5e63bfdd
https://github.com/WeblateOrg/weblate/security/advisories/GHSA-jfgp-674x-6q4p
https://github.com/WeblateOrg/weblate/commit/b6a7eace155fa0feaf01b4ac36165a9c5e63bfdd
https://github.com/WeblateOrg/weblate/security/advisories/GHSA-jfgp-674x-6q4p

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