SeaCMS ass.php authorization

published 2026-08-31 2 mo ago modified 2026-08-31 2 mo ago also EUVD-2026-68311

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits: 0; none known

A security vulnerability has been detected in SeaCMS up to 13.6. This vulnerability affects unknown code of the file /ass.php. The manipulation leads to authorization bypass. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: partial
Assessed: 2 mo ago (2026-08-31)

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/T-Chachamaru/seacms-13.6-security-advisories/blob/a084a3e573240d54860153321df271280daec262/c-011-ass-paywall-url-disclosure.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	6.9	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CNA	3.0	5.3	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CNA	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR
CNA	4.0	5.5	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CNA	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

n/a SeaCMS

Classification

Weakness

CWE-639 Authorization Bypass Through User-Controlled Key
CWE-285 Improper Authorization

References

github.com /T-Chachamaru/seacms-13.6-security-advisories/blob/a084a3e573240d54860153321df271280daec262/c-011-ass-paywall-
exploit
vuldb.com /vuln/397104
vdb-entry
vuldb.com /vuln/397104/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-82602
third-party-advisory
vuldb.com /submit/892789
third-party-advisory

Sources

CVE List CVE-2026-82602
NVD CVE-2026-82602

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary