Weblate lacks rate limiting when verifying second factor
Impact
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.
Patches
This issue has been addressed in Weblate 5.12 via https://github.com/WeblateOrg/weblate/pull/14918.
References
Thanks to obscuredeer for reporting this issue at HackerOne.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | weblate | < 5.12 | 5.12 |
References
- https://github.com/WeblateOrg/weblate/security/advisories/GHSA-57jg-m997-cx3q
- https://nvd.nist.gov/vuln/detail/CVE-2025-47951
- https://github.com/WeblateOrg/weblate/pull/14918
- https://github.com/WeblateOrg/weblate/commit/f806293451248c5d95e45b3b507e9d158bc4f384
- https://hackerone.com/reports/3150564
- https://github.com/WeblateOrg/weblate
- https://github.com/WeblateOrg/weblate/releases/tag/weblate-5.12.1
- https://pypi.org/project/weblate
- https://github.com/advisories/GHSA-57jg-m997-cx3q
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-307- Platform
- Python (PyPI)
- Package
weblate- Disclosed
- 16.06.2025
- Updated
- 11.10.2026 15:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-2039 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-57jg-m997-cx3q - CC BY 4.0
Vulnerability history: weblate
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 36
- First → latest
- 03.2017 08.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 6
- Medium 22
- Low 7
Disclosures per year
- 2017: 1
- 2018: 0
- 2019: 0
- 2020: 0
- 2021: 0
- 2022: 1
- 2023: 0
- 2024: 1
- 2025: 12
- 2026: 21
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Weblate lacks rate limiting when verifying second factor this entry
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