What is CVE-2023-4279?

CVE-2023-4279 is a high-severity vulnerability in Solwininfotech User Activity Log, classified under CWE-290 AUTHENTICATION BYPASS BY SPOOFING. CVSS score: 7.5/10. Published 2023-09-04.

How severe is CVE-2023-4279?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-4279 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Solwininfotech User Activity Log

CVE-2023-4279

This User Activity Log WordPress plugin before 1.6.7 retrieves client IP addresses from potentially untrusted headers, allowing an attacker to manipulate its value. This may be used to hide the source of malicious traffic.

Published 2023-09-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Solwininfotech User Activity Log
User Activity Log — versions 0

Public proof-of-concept exploits

References

wpscan.com/vulnerability/2bd2579e-b383-4d12-b207-6fc32cfb82bc (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2023-4279?: CVE-2023-4279 is a high-severity vulnerability in Solwininfotech User Activity Log, classified under CWE-290 AUTHENTICATION BYPASS BY SPOOFING. CVSS score: 7.5/10. Published 2023-09-04.
How severe is CVE-2023-4279?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-4279 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.