XML External Entity Injection in MoguBlog WeChat Callback Handler by Moxi
CVE-2026-89260

8.7HIGH

Key Information:

Vendor

Moxi624

Status
Mogublog
Vendor
CVE Published:
11 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-89260?

MoguBlog versions up to 6.2 are susceptible to an XML external entity injection vulnerability found in the WeChat callback handler. The WechatRestApi.index() method allows unauthenticated attackers to manipulate request bodies and take advantage of the flawed SignUtil.xmlToMap() implementation, which leverages an unprotected dom4j SAXReader without restrictions on DTD or external entity declarations. By injecting DOCTYPE declarations, an attacker could read sensitive local files or trigger unauthorized outbound HTTP requests, with potentially harmful data reflected in error responses.

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-2026-89260 - 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://github.com/moxi624/mogu_blog_v2/blob/025d78c7ac7e...
technical-description

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
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
.