What is CVE-2026-78333?

CVE-2026-78333 is a high-severity vulnerability in 12 Step Meeting List, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-08-27.

How severe is CVE-2026-78333?

High severity. CVSS v3 base score is 8.8 out of 10.

XSS in 12 Step Meeting List

CVE-2026-78333

The 12 Step Meeting List WordPress plugin before 3.19.17 does not sanitise and escape a value submitted by unauthenticated users before storing it in its activity log and outputting it back in an admin area page, leading to a Stored Cross-Site Scripting issue which could be used against high privilege users such as admin.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (6.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Unknown 12 Step Meeting List

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-78333?: CVE-2026-78333 is a high-severity vulnerability in 12 Step Meeting List, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-08-27.
How severe is CVE-2026-78333?: High severity. CVSS v3 base score is 8.8 out of 10.