WordPress Plugin Vulnerabilities
WP OAuth Server < 4.2.2 - Admin+ Stored XSS
Description
The plugin does not sanitize and escape Client IDs, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)
Proof of Concept
Edit a client ("OAuth Server > Clients) and put the following payload in the "Client ID" field: "><script>alert(/XSS/)</script>
The XSS will be triggered in the Clients list, as well as when editing the client
v4.2.1 added sanitisation, but no escaping, so a payload like " style=animation-name:rotation onanimationstart=alert(/XSS/)// would work as well (but only be triggered when editing the client)
Affects Plugins
Fixed in 4.2.2 References
CVE
Classification
Type
XSS
OWASP top 10
CWE
CVSS
Miscellaneous
Original Researcher
Lana Codes
Submitter
Lana Codes
Submitter website
Submitter twitter
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2022-11-08 (about 1 years ago)
Added
2022-11-08 (about 1 years ago)
Last Updated
2022-11-08 (about 1 years ago)
WPScan 