XSS in Joinchat
CVE-2026-118071
The Joinchat WordPress plugin before 6.4.2 does not escape the message of its button block before outputting it in an HTML attribute on the front end, which could allow users with the Author role and above to perform Stored Cross-Site Scripting attacks against any visitor of the post, including administrators.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (4.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
- Joinchat
Weakness classification (CWE)
References
- wpscan.com/vulnerability/6ac942c3-d39f-4431-97c4-ba9d8c87df21/ (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-118071?
- CVE-2026-118071 is a medium-severity vulnerability in Joinchat, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-10-30.
- How severe is CVE-2026-118071?
- Medium severity. CVSS v3 base score is 6.8 out of 10.