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CVE-2026-87901

Quick assessment

Affected
phpBB phpBB
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.

注册模块中未正确进行数据清理，导致可被利用的反射型跨站脚本（XSS）漏洞。

AI Predicted 6.1 Difficulty: Easy

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
phpBB phpBB 3.3.0≤ 3.3.18 affected
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I. Basic Information for CVE-2026-87901

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Improper sanitization in the registration module allows reflected Cross-Site Scripting.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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
phpBB phpBB 3.3.0 ~ 3.3.18 -

II. Public POCs for CVE-2026-87901

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-87901

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Vendor Pages for CVE-2026-87901 (1)

IV. Related Vulnerabilities

Same product: phpBB
Same vendor: phpBB
Same weakness: CWE-79

V. Comments for CVE-2026-87901

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