Cross Site Scripting Vulnerability in SeaCMS by SeaCMS
CVE-2026-82601

5.3MEDIUM

Key Information:

Vendor

SeaCMS

Status
Seacms
Vendor
CVE Published:
31 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82601?

A vulnerability has been discovered in SeaCMS versions up to 13.6 that may permit remote attackers to execute cross site scripting (XSS) attacks. The issue resides in the handling of specific input within the '/err.php' file, where manipulation of the 'errtxt' argument can lead to the execution of arbitrary scripts in the user's browser. As the exploit has been publicly disclosed, it poses a serious risk to the security of affected installations. Website administrators are advised to take immediate action to mitigate this vulnerability.

Affected Version(s)

SeaCMS 13.0

SeaCMS 13.1

SeaCMS 13.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-82601 - Proof of Concept

References

https://vuldb.com/vuln/397103
vdb-entrytechnical-description
https://vuldb.com/vuln/397103/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82601
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

T-Chachamaru (VulDB User)
.