What is CVE-2025-8783?

CVE-2025-8783 is a medium-severity vulnerability in Kleor Contact Manager, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2025-08-19.

How severe is CVE-2025-8783?

Medium severity. CVSS v3 base score is 4.4 out of 10.

XSS in Kleor Contact Manager

CVE-2025-8783

The Contact Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'title’ parameter in all versions up to, and including, 8.6.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (21.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.

Affected products

Kleor Contact Manager — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2025-8783?: CVE-2025-8783 is a medium-severity vulnerability in Kleor Contact Manager, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2025-08-19.
How severe is CVE-2025-8783?: Medium severity. CVSS v3 base score is 4.4 out of 10.