CVE-2026-89264
CVE-2026-89264
MoguBlog through 6.2 fails to validate the comment author identity in the POST /web/comment/add endpoint, allowing authenticated users to post comments attributed to any other user. Attackers can supply arbitrary userUid values in the request body to impersonate other accounts including administrators.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Weakness classification (CWE)
References
- C12 - POST /web/comment/add proof of concept (exploit)
- CommentRestApi.add persists the author uid taken from the request body (technical-description)
- MoguBlog releases (release-notes)
- Product (product)
- VulnCheck Advisory: MoguBlog through 6.2 Comment Author Spoofing via Request-Body Identity (third-party-advisory)
Frequently asked questions
- What is CVE-2026-89264?
- CVE-2026-89264 is a medium-severity vulnerability, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-09-11.
- How severe is CVE-2026-89264?
- Medium severity. CVSS v3 base score is 4.3 out of 10.