What’s Vulnerable › Vulnerabilities

CVE-2025-47951: Weblate lacks rate limiting when verifying second factor

• Severity: medium (CVSS 4.9 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-307

Description

Weblate is a web based localization tool. Prior to version 5.12, the verification of the second factor was not subject to rate limiting. The absence of rate limiting on the second factor endpoint allows an attacker with valid credentials to automate OTP guessing. 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/f806293451248c5d95e45b3b507e9d158bc4f384
• https://github.com/WeblateOrg/weblate/pull/14918
• https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.12.1
• https://github.com/WeblateOrg/weblate/security/advisories/GHSA-57jg-m997-cx3q
• https://hackerone.com/reports/3150564

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