Vulnerability · Published Feb 28, 2026 · Assigned by VulnCheck

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

Medium 5.5

In plain English

A medium-severity cross-site scripting in wpForo Forum from gVectors Team. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.3%top 81.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
gVectors Team	wpForo Forum	2.4 – before 2.4.16

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

References

wpForo Forum WordPress Plugin product
wpForo Forum Contributors & Developers patch
VulnCheck Advisory: wpForo Forum 2.4.14 Stored XSS via Unsafe JSON Encoding in Inline Script third-party-advisory