Description
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.
References7
- plugins.trac.wordpress.org/browser/share-button/tags/1.30/admin…
- plugins.trac.wordpress.org/browser/share-button/tags/1.30/class…
- plugins.trac.wordpress.org/browser/share-button/tags/1.30/class…
- plugins.trac.wordpress.org/browser/share-button/tags/1.30/class…
- plugins.trac.wordpress.org/browser/share-button/tags/1.30/class…
- plugins.trac.wordpress.org/changeset?reponame=&old=3735252%40sh…
- www.wordfence.com/threat-intel/vulnerabilities/id/bc098f5d-3c59…
Metrics
- CVSS 3.1
-
6.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 9 · as of 10 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.