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CVE-2026-28560— wpForo Forum 2.4.14 Stored XSS via Unsafe JSON Encoding in Inline Script

Quick assessment

Affected
gVectors Team wpForo Forum
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.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin wpForo Forum 2.4.14版本存在跨站脚本漏洞，该漏洞源于json_encode未使用JSON_HEX_TAG标志，可能导致存储型跨站脚本攻击。

CVSS 5.5 · Medium EPSS 0.33% · P23

Affected Version Matrix 2

VendorProduct Version RangeStatus
gVectors Team wpForo Forum 2.4< 2.4.16 affected
2.4.16 unaffected
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I. Basic Information for CVE-2026-28560

Vulnerability Information
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Vulnerability Title
wpForo Forum 2.4.14 Stored XSS via Unsafe JSON Encoding in Inline Script
Source: CVE Program / CVE List V5
Vulnerability Description
wpForo Forum 2.4.14 contains a stored cross-site scripting vulnerability that allows script injection via forum URL data output into an inline script block using json_encode without the JSON_HEX_TAG flag. Attackers set a forum slug containing a closing script tag or unescaped single quote to break out of the JavaScript string context and execute arbitrary script in all visitors' browsers.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/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
Vulnerability Title
WordPress plugin wpForo Forum 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin wpForo Forum 2.4.14版本存在跨站脚本漏洞，该漏洞源于json_encode未使用JSON_HEX_TAG标志，可能导致存储型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
gVectors Team wpForo Forum 2.4 ~ 2.4.16 -

II. Public POCs for CVE-2026-28560

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III. Intelligence Information for CVE-2026-28560

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Vendor Pages for CVE-2026-28560 (1)

Same Patch Batch · gVectors Team · 2026-02-28 · 9 CVEs total

CVE-2026-28562 8.2 HIGH wpForo Forum 2.4.14 SQL Injection via Topics ORDER BY Parameter
CVE-2026-28557 6.5 MEDIUM wpForo Forum < 2.4.16 Privilege Escalation via Role Synchronization Handler
CVE-2026-28558 6.4 MEDIUM wpForo Forum 2.4.14 Stored XSS via SVG Avatar File Upload
CVE-2026-28561 5.5 MEDIUM wpForo Forum 2.4.14 Stored XSS via Unescaped Forum Description in Templates
CVE-2026-28556 5.4 MEDIUM wpForo Forum 2.4.14 Missing Authorization via Topic Management Form Handlers
CVE-2026-28559 5.3 MEDIUM wpForo Forum 2.4.14 Information Disclosure via Global RSS Feed
CVE-2026-28555 4.3 MEDIUM wpForo Forum 2.4.14 Missing Authorization via Topic Close AJAX Handler
CVE-2026-28554 4.3 MEDIUM wpForo Forum 2.4.14 Missing Authorization via Post Approval AJAX Handler

IV. Related Vulnerabilities

Same product: wpForo Forum
Same vendor: gVectors Team
Same weakness: CWE-79

V. Comments for CVE-2026-28560

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