What is CVE-2025-47951?

CVE-2025-47951 is a medium-severity vulnerability in Weblate, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 4.9/10. Published 2025-06-16.

How severe is CVE-2025-47951?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Vulnerability in Weblate

CVE-2025-47951

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.

Published 2025-06-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (16.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Weblate
Weblateorg Weblate — versions < 5.12

Weakness classification (CWE)

CWE-307 — Improper Restriction of Excessive Authentication Attempts

References

github.com/WeblateOrg/weblate/security/advisories/GHSA-57jg-m997-cx3q (Vendor Advisory)
github.com/WeblateOrg/weblate/pull/14918 (Issue Tracking)
github.com/WeblateOrg/weblate/commit/f806293451248c5d95e45b3b507e9d158bc4f384 (Patch)
hackerone.com/reports/3150564 (Permissions Required)
github.com/WeblateOrg/weblate/releases/tag/weblate-5.12.1 (Release Notes)

Frequently asked questions

What is CVE-2025-47951?: CVE-2025-47951 is a medium-severity vulnerability in Weblate, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 4.9/10. Published 2025-06-16.
How severe is CVE-2025-47951?: Medium severity. CVSS v3 base score is 4.9 out of 10.