CVE-2026-0549: Groups <= 3.10.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'groups_group_info' Shortcode

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-19 · updated 2026-06-17
Weakness: CWE-79

Description

The Groups plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'groups_group_info' shortcode in all versions up to, and including, 3.10.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

itthinx Groups: through 3.10.0

References

https://plugins.trac.wordpress.org/browser/groups/tags/3.9.0/lib/views/class-groups-shortcodes.php?marks=185#L185
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3438974%40groups&new=3438974%40groups&sfp_email=&sfph_mail=#file39
https://www.wordfence.com/threat-intel/vulnerabilities/id/75000e67-7914-43af-be1d-82990ada5129?source=cve

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