XSS in S2member

CVE-2026-15047

The s2Member WordPress plugin before 260805 does not escape several shortcode attributes before outputting them inside an inline script context, allowing users with contributor-level access to inject arbitrary JavaScript that executes when a viewer opens the post (stored XSS).

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: 0.004 (34.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-15047: held from 0.002 to 0.004.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

  • S2member — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-15047?
CVE-2026-15047 is a medium-severity vulnerability in S2member, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-08-10.
How severe is CVE-2026-15047?
Medium severity. CVSS v3 base score is 6.8 out of 10.