Comment Author Spoofing Vulnerability in MoguBlog by Moxi
CVE-2026-89264

5.3MEDIUM

Key Information:

Vendor

Moxi624

Status
Mogublog
Vendor
CVE Published:
11 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-89264?

MoguBlog versions up to 6.2 contain a vulnerability that improperly validates the identity of the comment author. This issue is present in the POST /web/comment/add endpoint, where authenticated users can exploit the system to post comments that appear to be from any user, including administrators. By manipulating the userUid values in the request body, attackers can impersonate other users, potentially leading to unauthorized actions and a compromise of user privacy.

Affected Version(s)

MoguBlog 0 <= 6.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-89264 - Proof of Concept

References

https://github.com/LinYuanyi1/cve-request-poc/blob/master...
exploit
https://github.com/moxi624/mogu_blog_v2/blob/025d78c7ac7e...
technical-description
https://gitee.com/moxi159753/mogu_blog_v2/releases
release-notes

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mingsheng Lin
.