What is CVE-2026-85177?

CVE-2026-85177 is a medium-severity vulnerability in Crmeb, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-09-03.

How severe is CVE-2026-85177?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Crmeb

CVE-2026-85177

CRMEB through 6.0.0 fails to validate message ownership in the edit_message handler of MessageSystemController.php, allowing authenticated users to modify arbitrary system inbox messages. Attackers can update any message's columns including is_del, look, and uid to delete, mark read, or reassign victim notifications without authorization.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-09-03 · last modified 2026-09-23.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (17.2th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000

Affected products

Crmeb

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

github.com/crmeb/CRMEB (product)
github.com/crmeb/CRMEB/blob/v6.0.0/crmeb/app/api/controller/v1/user/MessageSyst… (technical-description)
github.com/crmeb/CRMEB/issues/120 (issue-tracking)
www.vulncheck.com/advisories/crmeb-through-6.0.0-unauthorized-message-modificat… (third-party-advisory)

Frequently asked questions

What is CVE-2026-85177?: CVE-2026-85177 is a medium-severity vulnerability in Crmeb, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-09-03.
How severe is CVE-2026-85177?: Medium severity. CVSS v3 base score is 5.4 out of 10.