XSS in Maxfoundry Social Share Buttons
CVE-2026-100108
The Social Share Buttons plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'form (containing share_url)' parameter in all versions up to, and including, 1.30 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that the 7-day review-nag timer has elapsed since the attacker's first wp-admin visit, as the nonce needed to reach the save-network handler is only rendered in the DOM once that timer has passed.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/bc098f5d-3c59-4046-bce8-ac258…
- plugins.trac.wordpress.org/browser/share-button/tags/1.30/classes/class-social-…
- plugins.trac.wordpress.org/browser/share-button/tags/1.30/classes/blocks/networ…
- plugins.trac.wordpress.org/browser/share-button/tags/1.30/classes/class-network…
- plugins.trac.wordpress.org/browser/share-button/tags/1.30/admin/review_notice.p…
- plugins.trac.wordpress.org/browser/share-button/tags/1.30/classes/class-social…
- plugins.trac.wordpress.org/changeset
Frequently asked questions
- What is CVE-2026-100108?
- CVE-2026-100108 is a medium-severity vulnerability in Maxfoundry Social Share Buttons, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-10-16.
- How severe is CVE-2026-100108?
- Medium severity. CVSS v3 base score is 6.4 out of 10.