Auth bypass in Atjiu Pybbs
CVE-2025-8547
A vulnerability has been found in atjiu pybbs up to 6.0.0 and classified as critical. This vulnerability affects unknown code of the component Email Verification Handler. The manipulation leads to improper authorization. The attack can be…
EPSS: 0.004 (60.9th 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:N/I:L/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-318676 | atjiu pybbs Email Verification improper authorization (vdb-entry)
- VDB-318676 | CTI Indicators (IOB, IOC, TTP) (signature, permissions-required)
- Submit #622180 | atjiu https://github.com/atjiu/pybbs <=6.0.0 Registration email is not verified (third-party-advisory)
- github.com/atjiu/pybbs/issues/200 (issue-tracking)
- github.com/atjiu/pybbs/issues/200 (issue-tracking)
- github.com/atjiu/pybbs/issues/200 (exploit, issue-tracking)
- github.com/atjiu/pybbs/commit/044f22893bee254dc2bb0d30f614913fab3c22c2 (patch)
Frequently asked questions
- What is CVE-2025-8547?
- CVE-2025-8547 is a medium-severity vulnerability in Atjiu Pybbs, classified under Improper Authorization. CVSS score: 5.3/10. Published 2025-08-05.
- How severe is CVE-2025-8547?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-8547 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.