CVE-2023-5560 - CVE House
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Status published Unknown CVE-2023-5560

WP-UserOnline < 2.88.3 - Unauthenticated Stored XSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Krzysztof Zając (CERT PL)
  • WPScan

References

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Affected Vendor

Affected Software

WP-UserOnline
Vulnerable Versions:
0

Timeline

Official Publish: November 27th, 2023
Last Modified: November 21st, 2024
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.