CVE-2026-28560

MEDIUM

wpForo Forum 2.4.0-2.4.15 - Stored Cross-Site Scripting via Forum URL in Inline Script

Title source: llm

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.

References (3)

Core 3

Core References

Product product

https://wordpress.org/plugins/wpforo/

Product patch

https://wordpress.org/plugins/wpforo/#developers

Third Party Advisory third-party-advisory

https://www.vulncheck.com/advisories/wpforo-forum-stored-xss-via-unsafe-json-encoding-in-inline-script

Scores

CVSS v3 5.5

EPSS 0.0023

EPSS Percentile 13.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (3)

gvectors/wpforo_forum 2.4.0 - 2.4.16

gVectors Team/wpForo Forum 2.4 - 2.4.16

gVectors Team/wpForo Forum 2.4.16

Published Feb 28, 2026

Tracked Since Mar 01, 2026