Vulnerability · Published Mar 2, 2026 · Assigned by VulDB

CVE-2026-3404thinkgem JeeSite Endpoint CasOutHandler.java xml external entity reference

Medium 5.0

In plain English

A medium-severity XML external entity in JeeSite from thinkgem. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).

Severity (CVSS 3.1)5.0Medium

Exploit odds (30 days)0.4%top 65.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A flaw has been found in thinkgem JeeSite up to 5.15.1. Impacted is an unknown function of the file /com/jeesite/common/shiro/cas/CasOutHandler.java of the component Endpoint. Executing a manipulation can lead to xml external entity reference. The attack may be performed from remote. Attacks of this nature are highly complex. The exploitability is considered difficult. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products (as reported)

Vendor	Product	Versions
thinkgem	JeeSite	5.15.05.15.1

Weakness: CWE-611, CWE-610 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-348299 | thinkgem JeeSite Endpoint CasOutHandler.java xml external entity reference vdb-entry
VDB-348299 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #763732 | Jeesite v5.15.1 XXE third-party-advisory
https://www.yuque.com/la12138/pa2fpb/ew8x2qss8dv0bsu0?singleDoc exploit