CVE-2026-28560
Stored XSS in wpForo Forum 2.4.14 via Unsafe JSON Encoding
Publication date: 2026-02-28
Last updated on: 2026-03-04
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| gvectors | wpforo_forum | From 2.4.0 (inc) to 2.4.16 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The vulnerability in wpForo Forum 2.4.14 is a stored cross-site scripting (XSS) issue. It occurs because the forum URL data is output into an inline script block using json_encode without the JSON_HEX_TAG flag. This allows attackers to inject malicious scripts by setting a forum slug that contains a closing script tag or an unescaped single quote, which breaks out of the JavaScript string context and enables execution of arbitrary scripts in the browsers of all visitors.
How can this vulnerability impact me? :
This vulnerability can impact users by allowing attackers to execute arbitrary scripts in the browsers of all visitors to the forum. This can lead to theft of sensitive information such as cookies or session tokens, unauthorized actions performed on behalf of users, defacement of the website, or distribution of malware.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know