CVE-2026-28560

MEDIUM

5.5

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.

CVE Details

CVSS v3.1 Score5.5

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredHIGH

User InteractionNONE

Published2/28/2026

Last Modified3/4/2026

Sourcenvd

Honeypot Sightings0

Affected Products

gvectors:wpforo_forum

Weaknesses (CWE)

CWE-79

References

https://wordpress.org/plugins/wpforo/(disclosure@vulncheck.com)

https://wordpress.org/plugins/wpforo/#developers(disclosure@vulncheck.com)

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

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.