CVE-2026-82603Public exploitNetwork attack vectorHinoki check available

Authenticated arbitrary file deletion via path traversal

Published Aug 31, 2026 · Updated Aug 31, 2026

Path traversal in SeaCMS 13.0 through 13.6 allows remote authenticated users to delete writable .js files via Comment Cache requests. The member.php del_pl handler concatenates request-controlled itype and vid values into data/cache/review/$itype/$vid.js, and delFile() passes the resulting path to unlink() without canonicalization or a directory-boundary check. A low-privileged member must own the referenced comment; successful exploitation deletes a web-server-writable .js file and the associated comment row.

CVSS severity5.4
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in SeaCMS 13.0 through 13.6 allows remote authenticated users to delete writable .js files via Comment Cache requests. The member.php del_pl handler concatenates request-controlled itype and vid values into data/cache/review/$itype/$vid.js, and delFile() passes the resulting path to unlink() without canonicalization or a directory-boundary check. A low-privileged member must own the referenced comment; successful exploitation deletes a web-server-writable .js file and the associated comment row.

The record

CVE
CVE-2026-82603
Published
Aug 31, 2026
Updated
Aug 31, 2026
Vendor
SeaCMS
Product
SeaCMS
Classifications
CWE-22, T1070.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=13.0
  2. Affected versionversion=13.1
  3. Affected versionversion=13.2
  4. Affected versionversion=13.3
  5. Affected versionversion=13.4
  6. Affected versionversion=13.5
  7. Affected versionversion=13.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SeaCMS · SeaCMSversion=13.0; version=13.1; version=13.2; version=13.3; version=13.4; version=13.5; version=13.6

Published CVSS scores

5.4VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
5.5VulDB CNAAV:N/AC:L/Au:S/C:N/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1070.004File Deletion

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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