RCE in Seacms
CVE-2026-82601
A weakness has been identified in SeaCMS up to 13.6. This affects an unknown part of the file /err.php. Executing a manipulation of the argument errtxt can lead to cross site scripting. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (37.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002
Affected products
- Seacms — versions 13.0, 13.1, 13.2
Weakness classification (CWE)
References
- vuldb.com/vuln/397103 (technical-description, vdb-entry)
- vuldb.com/vuln/397103/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-82601 (third-party-advisory)
- vuldb.com/submit/892786 (third-party-advisory)
- github.com/T-Chachamaru/seacms-13.6-security-advisories/blob/a084a3e573240d5486… (exploit)
Frequently asked questions
- What is CVE-2026-82601?
- CVE-2026-82601 is a medium-severity vulnerability in Seacms, classified under Cross-site Scripting. CVSS score: 4.3/10. Published 2026-08-31.
- How severe is CVE-2026-82601?
- Medium severity. CVSS v3 base score is 4.3 out of 10.