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Vulnerability record · CVE-2026-89260 · published 11 September 2026

CVE-2026-89260: XML external entity (XXE) vulnerability

MoguBlog through 6.2 contains an XML external entity injection vulnerability in the WeChat callback handler at POST /wechat/wechatCheck. The WechatRestApi.index() method passes the raw request body to SignUtil.xmlToMap(), which uses an unhardened dom4j SAXReader without DTD or external-entity restrictions. Unauthenticated remote attackers can submit DOCTYPE declarations with external parameter entities to read arbitrary local files or trigger outbound HTTP requests, with resolved entities reflected in error responses.

8.7 CVSS 4.0 High EPSS 0.73% · top 47.5% CWE-611 · XML external entity (XXE) Deferred
8.7CVSS 4.0 base score
0.73%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
11 Sep 2026Last modified by NVD

Description

MoguBlog through 6.2 contains an XML external entity injection vulnerability in the WeChat callback handler at POST /wechat/wechatCheck. The WechatRestApi.index() method passes the raw request body to SignUtil.xmlToMap(), which uses an unhardened dom4j SAXReader without DTD or external-entity restrictions. Unauthenticated remote attackers can submit DOCTYPE declarations with external parameter entities to read arbitrary local files or trigger outbound HTTP requests, with resolved entities reflected in error responses.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://gitee.com/moxi159753/mogu_blog_v2/releases
https://github.com/LinYuanyi1/cve-request-poc/blob/master/mogublog-poc/C10_wechat_callback_unsigned.py
https://github.com/moxi624/mogu_blog_v2
https://github.com/moxi624/mogu_blog_v2/blob/025d78c7ac7e19b1abf796fa3cc158d855723d15/mogu_utils/src/main/java/com/moxi/
https://github.com/moxi624/mogu_blog_v2/blob/025d78c7ac7e19b1abf796fa3cc158d855723d15/mogu_web/src/main/java/com/moxi/mo
https://www.vulncheck.com/advisories/mogublog-through-6.2-xml-external-entity-injection-in-the-unauthenticated-wechat-ca

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Source: NIST National Vulnerability Database (record CVE-2026-89260), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.