CVE-2023-5560
CVE-2023-5560 is a medium-severity vulnerability in Lesterchan Wp-useronline with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- EPSS exploit prediction: 1% (40th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Lesterchan Wp-useronline
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2023-5560?
- 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.
- How severe is CVE-2023-5560?
- CVE-2023-5560 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2023-5560 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-5560?
- CVE-2023-5560 affects Lesterchan Wp-useronline. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2023-5560?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2023-5560 published?
- CVE-2023-5560 was published on 2023-11-27 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:lesterchan:wp-useronline:*:*:*:*:*:wordpress:*:*
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