Auth bypass in Atjiu Pybbs
CVE-2025-8546
A vulnerability, which was classified as problematic, was found in atjiu pybbs up to 6.0.0. This affects the function adminlogin/login of the component Verification Code Handler. The manipulation leads to guessable captcha. It is possible…
EPSS: 0.003 (54.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C.
Affected products
- Atjiu Pybbs — versions 6.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- VDB-318675 | atjiu pybbs Verification Code login Captcha (vdb-entry, technical-description)
- VDB-318675 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #622179 | atjiu https://github.com/atjiu/pybbs <=6.0.0 CAPTCHA reuse Vulnerability (third-party-advisory)
- github.com/atjiu/pybbs/issues/199 (issue-tracking)
- github.com/atjiu/pybbs/issues/199 (issue-tracking)
- github.com/atjiu/pybbs/issues/199 (exploit, issue-tracking)
- github.com/atjiu/pybbs/commit/ecaf8d46944fd03e3c4ea05698f8acf0aaa570cf (patch)
Frequently asked questions
- What is CVE-2025-8546?
- CVE-2025-8546 is a medium-severity vulnerability in Atjiu Pybbs, classified under CWE-804. CVSS score: 5.3/10. Published 2025-08-05.
- How severe is CVE-2025-8546?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-8546 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.