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CVE-2026-102586— Moodle: xss via password reset link due to insufficient username escaping

Quick assessment

Affected
CVE-2026-102586
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 Moodle 中发现了一个漏洞。密码重置页面对用户名输入的处理存在不足，使得远程攻击者能够实施跨站脚本（XSS）攻击。通过诱使未认证用户访问一个经过特殊构造的密码重置链接，攻击者可以在受害者的浏览器中执行任意脚本。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

I. Basic Information for CVE-2026-102586

Vulnerability Information
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Vulnerability Title
Moodle: xss via password reset link due to insufficient username escaping
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Moodle. Insufficient sanitization of username input on the password reset page allows a remote attacker to conduct a cross-site scripting (XSS) attack. By convincing an unauthenticated user to access a specially crafted password reset link, an attacker could execute arbitrary script in the victim's browser.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/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
- - 5.2.0 ~ 5.2.2 -

II. Public POCs for CVE-2026-102586

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-102586

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Other References for CVE-2026-102586 (4)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2026-102586

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