CVE-2026-28560

wpForo Forum 2.4.14 Stored XSS via Unsafe JSON Encoding in Inline Script

State: Published
Severity: 4.8 Medium
Published: Feb 28, 2026
Updated: May 11, 2026
Reserved: Feb 28, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	4.8 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N	VulnCheck
3.1	5.5 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N	VulnCheck

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
wpForo ForumgVectors Team	2.4 to before 2.4.16Affected 2.4.16Not affected

References

wpForo Forum WordPress Pluginproduct
wpForo Forum Contributors & Developerspatch
VulnCheck Advisory: wpForo Forum 2.4.14 Stored XSS via Unsafe JSON Encoding in Inline Scriptthird-party-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.