Quick answers
- Is CVE-2026-109972 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-109972 being exploited in the wild.
- How severe is CVE-2026-109972?
- Medium severity, with a CVSS score of 6.4, published 28 October 2026.
- Which products and versions are affected?
- s2Member up to and including 261011.
- Is there a fix for CVE-2026-109972?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-109972 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-109972?
- Check whether you run s2Member at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A Stored Cross-Site Scripting vulnerability exists in the date_format parameter due to insufficient input sanitization and output escaping. Authenticated attackers with contributor access or above can inject arbitrary web scripts by exploiting the fact that wp_kses_post() is bypassed via backslash-escaped sequences that PHP's date() function converts to HTML tag characters at render time, after WordPress's shortcode_parse_atts() applies stripcslashes() to attribute values.
Affected products
- s2Member s2Member up to and including 261011
Timeline
- 2026-10-28: disclosed