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CVE-2026-100880— zhistaredu StarTraining Upload Endpoint MimeTypeUtils.java cross site scripting

Quick assessment

Affected

zhistaredu StarTraining

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 zhistaredu StarTraining 3.8.1 及更早版本中发现了一个安全弱点。该漏洞影响组件“上传端点”中文件的未知代码部分。该问题源于对参数 File 的错误处理，可导致跨站脚本攻击（XSS）。攻击者可远程发起此类攻击。相关利用代码已公开，可能被用于实施攻击。早在漏洞披露初期即已联系厂商，但未收到任何回应。

CVSS 3.5 · Low Updated Sep 28, 2026

Possible ATT&CK Techniques 2 AI

T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise

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Vulnerability Information

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Vulnerability Title

zhistaredu StarTraining Upload Endpoint MimeTypeUtils.java cross site scripting

Source: CVE Program / CVE List V5

Vulnerability Description

A weakness has been identified in zhistaredu StarTraining up to 3.8.1. This vulnerability affects unknown code of the file du-common/src/main/java/com/edu/common/utils/file/MimeTypeUtils.java of the component Upload Endpoint. This manipulation of the argument File causes cross site scripting. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
zhistaredu	StarTraining	3.8.0	`cpe:2.3:a:zhistaredu:startraining::::::::`

II. Public POCs for CVE-2026-100880

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-100880

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Other References for CVE-2026-100880 (5)

https://github.com/ArrestX/startraining-advisories/blob/main/advisories/ST-VULN-006-stored-html-upload-xss.md exploit
https://vuldb.com/cve/CVE-2026-100880 third-party-advisory
https://vuldb.com/vuln/410810/cti signature permissions-required
https://vuldb.com/submit/915512 third-party-advisory
https://vuldb.com/vuln/410810 vdb-entry technical-description

https://www.cve.org/CVERecord?id=CVE-2026-100880

Same Patch Batch · zhistaredu · 2026-09-27 · 4 CVEs total

CVE-2026-100878	6.3 MEDIUM	zhistaredu StarTraining authRole Endpoint SysUser.java SysUser.isAdmin authorization
CVE-2026-100879	4.3 MEDIUM	zhistaredu StarTraining dataScope Endpoint SysRoleServiceImpl.java checkRoleAllowed author
CVE-2026-100881	2.6 LOW	zhistaredu StarTraining application.yml cross site scripting

IV. Related Vulnerabilities

Same product: StarTraining

Same vendor: zhistaredu

Same weakness: CWE-79

V. Comments for CVE-2026-100880

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-100880— zhistaredu StarTraining Upload Endpoint MimeTypeUtils.java cross site scripting

Quick assessment

Possible ATT&CK Techniques 2 AI

I. Basic Information for CVE-2026-100880

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-100880

III. Intelligence Information for CVE-2026-100880

Other References for CVE-2026-100880 (5)

Same Patch Batch · zhistaredu · 2026-09-27 · 4 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-100880

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