RCE in Atjiu Pybbs
CVE-2026-4494
A vulnerability was identified in atjiu pybbs 6.0.0. This affects the function create of the file src/main/java/co/yiiu/pybbs/controller/api/TopicApiController.java. The manipulation leads to cross site scripting. It is possible to initiat…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.000 (2.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.
Affected products
- Atjiu Pybbs — versions 6.0.0
Weakness classification (CWE)
References
- VDB-352020 | atjiu pybbs TopicApiController.java create cross site scripting (technical-description, vdb-entry)
- VDB-352020 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
- Submit #773779 | atjiu pybbs 6.0.0 Improper Neutralization of Alternate XSS Syntax (third-party-advisory)
- cna@vuldb.com (exploit)
Frequently asked questions
- What is CVE-2026-4494?
- CVE-2026-4494 is a low-severity vulnerability in Atjiu Pybbs, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-03-20.
- How severe is CVE-2026-4494?
- Low severity. CVSS v3 base score is 3.5 out of 10.