CVE-2026-28560

Medium
|4.8
No Exploit

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to inject malicious scripts that can run in the browsers of all visitors to a wpForo forum. It occurs when an attacker manipulates the forum's URL by including certain characters, which lets them break out of the intended code and execute their own scripts.

Technical 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 Analysis

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionRequired
Confidentiality ImpactHigh
Integrity ImpactHigh
Availability ImpactHigh
ScopeChanged

Vector String

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit Resources

Search for proof-of-concept code and exploit modules

Official References

Est. Bounty
$638($500-$1K)
Vendor Response
Grade APatched in 3 days

Quick Information

Published

Feb 28, 2026

about 1 month ago

Last Modified

Mar 4, 2026

about 1 month ago

Vendor

gvectors

Product

wpforo forum

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