CVE-2026-100522— Cotonti through 1.0.0 Reflected XSS via message.php lng parameter
Quick assessment
Affected
Cotonti Cotonti
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.
Cotonti 版本 1.0.0 及之前版本在 message.php 中存在一个反射型跨站脚本（XSS）漏洞。该漏洞是由于 lng 参数在输出到确认对话框前未进行适当的转义处理所致。未经身份验证的攻击者可以构造包含脚本有效载荷的恶意链接，利用 lng 参数在受害者浏览器会话中执行任意 JavaScript 代码。
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I. Basic Information for CVE-2026-100522
Vulnerability Information
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Vulnerability Title
Cotonti through 1.0.0 Reflected XSS via message.php lng parameter
Source: CVE Program / CVE List V5
Vulnerability Description
Cotonti through 1.0.0 contains a reflected cross-site scripting vulnerability in message.php where the lng parameter is not properly escaped before output in the confirmation dialog. Unauthenticated attackers can craft malicious links with script payloads in the lng parameter to execute arbitrary JavaScript in victim browser sessions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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
II. Public POCs for CVE-2026-100522
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Vendor Advisories for CVE-2026-100522 (1)
Vendor Pages for CVE-2026-100522 (1)
Other References for CVE-2026-100522 (3)
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https://github.com/Cotonti/Cotonti/issues/1907 issue-tracking
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https://github.com/Cotonti/Cotonti/blob/1.0.0/message.php technical-description
Same Patch Batch · Cotonti · 2026-09-26 · 4 CVEs total
| CVE-2026-100523 | 6.1 MEDIUM | Cotonti through 1.0.0 Open Redirect via message.php redirect parameter |
| CVE-2026-100521 | 6.1 MEDIUM | Cotonti through 1.0.0 Reflected XSS via search highlight parameter |
| CVE-2026-100524 | 5.4 MEDIUM | Cotonti through 1.0.0 Cross-Site Request Forgery via Extensions Manager |
IV. Related Vulnerabilities
Same product: Cotonti
-
CVE-2026-100524
Cotonti through 1.0.0 Cross-Site Request Forgery via Extensi -
CVE-2026-100523
Cotonti through 1.0.0 Open Redirect via message.php redirect -
CVE-2026-100521
Cotonti through 1.0.0 Reflected XSS via search highlight par -
CVE-2026-93873
Cotonti through 1.0.0 Cross-Site Request Forgery in the Cont -
CVE-2026-93872
Cotonti 1.0.0 PHP Object Injection via Comments Plugin Edit
Same vendor: Cotonti
-
CVE-2026-100524
Cotonti through 1.0.0 Cross-Site Request Forgery via Extensi -
CVE-2026-100523
Cotonti through 1.0.0 Open Redirect via message.php redirect -
CVE-2026-100521
Cotonti through 1.0.0 Reflected XSS via search highlight par -
CVE-2026-93873
Cotonti through 1.0.0 Cross-Site Request Forgery in the Cont -
CVE-2026-93872
Cotonti 1.0.0 PHP Object Injection via Comments Plugin Edit
Same weakness: CWE-79
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CVE-2026-7172
Stored Cross-Site Scripting (XSS) in TPVEnlanube
V. Comments for CVE-2026-100522
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