CVE-2025-49134: Weblate exposes personal IP address via e-mail

Severity: medium (CVSS 5.3 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: 2025-06-16 · updated 2026-06-17
Weakness: CWE-359

Description

Weblate is a web based localization tool. Prior to version 5.12, the audit log notifications included the full IP address of the acting user. This could be obtained by third-party servers such as SMTP relays, or spam filters. This issue has been patched in version 5.12.

Affected products

WeblateOrg weblate: before 5.12 — fixed in 5.12

How to fix

Upgrade to a fixed version: WeblateOrg weblate 5.12. Check the vendor advisory for mitigations.

References

https://github.com/WeblateOrg/weblate/commit/020b2905e4d001cff2452574d10e6cf3621b5f62
https://github.com/WeblateOrg/weblate/pull/15102
https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.12.1
https://github.com/WeblateOrg/weblate/security/advisories/GHSA-4qqf-9m5c-w2c5

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