Description
The Magazine Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the News Ticker block's clientId attribute in versions up to, and including, 1.8.6. This is due to insufficient input sanitization and output escaping in the NewsTicker::render() method, which concatenates the clientId block attribute into an HTML class attribute without applying esc_attr(). 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.
References6
- plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.5/i…
- plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.5/i…
- plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/i…
- plugins.trac.wordpress.org/browser/magazine-blocks/tags/1.8.6/i…
- plugins.trac.wordpress.org/changeset?reponame=&old=3656574%40ma…
- www.wordfence.com/threat-intel/vulnerabilities/id/34e0862d-55d3…
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: 29 · as of 8 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.