CVE-2026-28560CWE-79

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

Medium · published February 28, 2026

CVSS v4.0
4.8
EPSS
0%
Percentile
25.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
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
EPSS
0.00332 · 25.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-28T21:47Z
EPSS history
Timeline
  • 28 FEB 21:47Z
    wpForo Forum 2.4.14 Stored XSS via Unsafe JSON Encoding in Inline Script
    cvelistv5