Vulnerability · Published Aug 31, 2026 · Assigned by VulDB
CVE-2026-82601SeaCMS err.php cross site scripting
Medium 4.3
In plain English
A medium-severity cross-site scripting in SeaCMS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.4%top 60.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-79, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
References
- VDB-397103 | SeaCMS err.php cross site scripting vdb-entry, technical-description
- VDB-397103 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- CVE-2026-82601 | CVE Analysis and Report third-party-advisory
- Submit #892786 | SeaCMS 13.6 Cross Site Scripting third-party-advisory
- https://github.com/T-Chachamaru/seacms-13.6-security-advisories/blob/a084a3e573240d54860153321df271280daec262/c-007-errtxt-reflected-xss.md exploit