CVE-2026-28560 MEDIUM

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

Vendor Gvectors Team
Product wpForo Forum
Weakness CWE-79 · XSS
Published February 28, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction —
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 28, 2026 CVE published
May 11, 2026 Record updated