CVE-2023-5560

Public Exploit
WP-UserOnline < 2.88.3 - Unauthenticated Stored XSS

Description

The WP-UserOnline WordPress plugin before 2.88.3 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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.58%
Third-Party Advisory wpscan.com
Affected: Unknown WP-UserOnline
Published at:
Updated at:

References

Link Tags
https://wpscan.com/vulnerability/55d23184-fc5a-4090-b079-142407b59b05 third party advisory vdb entry exploit technical description

Frequently Asked Questions

What is the severity of CVE-2023-5560?
CVE-2023-5560 has been scored as a medium severity vulnerability.
How to fix CVE-2023-5560?
To fix CVE-2023-5560, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-5560 being actively exploited in the wild?
It is possible that CVE-2023-5560 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-5560?
CVE-2023-5560 affects Unknown WP-UserOnline.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.