CVE-2026-28560

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

CVSS 4.8 MEDIUMEPSS 0.2%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

28 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Affected products

gVectors Team · wpForo Forum

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References

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