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CVE-2026-102581— Moodle: xss in forum post templates due to insufficient escaping

Quick assessment

Affected
CVE-2026-102581
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。用于显示论坛帖子的模板中存在输出转义不足的问题，导致存储型跨站脚本（XSS）漏洞。攻击者可以将恶意内容注入到论坛帖子中，当其他用户浏览该受影响帖子时，其浏览器会执行任意脚本代码。

CVSS 4.6 · Medium EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 4

VendorProduct Version RangeStatus
None None 5.2.0< 5.2.2 affected
5.1.0< 5.1.6 affected
5.0.0< 5.0.9 affected
< 4.5.13 affected

I. Basic Information for CVE-2026-102581

Vulnerability Information
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Vulnerability Title
Moodle: xss in forum post templates due to insufficient escaping
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Moodle. Insufficient output escaping in templates used to display forum posts enables a stored cross-site scripting (XSS) vulnerability. An attacker can inject malicious content into a forum post, which then executes arbitrary script code in the browser of another user viewing the affected post.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/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

Vendor Product Affected Versions CPE Subscribe
- - 5.2.0 ~ 5.2.2 -

II. Public POCs for CVE-2026-102581

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-102581

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Patches & Fixes for CVE-2026-102581 (1)

Vendor Advisories for CVE-2026-102581 (2)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2026-102581

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