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CVE-2026-28560

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

Published: Feb 28, 2026Updated: Mar 4, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
5.5CVSSMEDIUM
EPSS Score
0.2%
Top 86.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

wpForo ForumgVectors Team
Mixed
Web & CMS Plugins / wordpress-plugin
wpforo forumgvectors
Mixed
Web & CMS Plugins / forum-wiki
gvectors teamcommercialWeb & CMS Pluginsaka wpdiscuz, wpforo
gvectorscommercialWeb & CMS Pluginsaka wpforo forum, wpdiscuz

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

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

Timeline

Published
Feb 28, 2026
Last Updated
Mar 4, 2026

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