CVE-2026-89264Public exploitNetwork attack vector

Authenticated comment impersonation via unvalidated userUid

Published Sep 11, 2026 · Updated Sep 24, 2026

Authorization bypass in MoguBlog through 6.2 allows remote authenticated users to post comments attributed to arbitrary accounts. CommentRestApi.add copies the request body's userUid into the persisted comment author field without binding it to the authenticated principal. An ordinary authenticated session is sufficient to falsify comment attribution, including attribution to administrators, without gaining their account privileges.

CVSS severity5.3
Medium
EPSS probability0.37%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in MoguBlog through 6.2 allows remote authenticated users to post comments attributed to arbitrary accounts. CommentRestApi.add copies the request body's userUid into the persisted comment author field without binding it to the authenticated principal. An ordinary authenticated session is sufficient to falsify comment attribution, including attribution to administrators, without gaining their account privileges.

The record

CVE
CVE-2026-89264
Published
Sep 11, 2026
Updated
Sep 24, 2026
Vendor
moxi624
Product
MoguBlog
Classifications
CWE-639, T1036
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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=0 <=6.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

moxi624 · MoguBlogversion=0 <=6.2

Published CVSS scores

4.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1036Masquerading

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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