Description
The Simple Yearly Archive plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `posttype` attribute of the `SimpleYearlyArchive` shortcode in all versions up to, and including, 2.2.4 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.
References6
- plugins.trac.wordpress.org/browser/simple-yearly-archive/tags/2…
- plugins.trac.wordpress.org/browser/simple-yearly-archive/tags/2…
- plugins.trac.wordpress.org/browser/simple-yearly-archive/trunk/…
- plugins.trac.wordpress.org/changeset?new=3525626%40simple-yearl…
- wordpress.org/plugins/simple-yearly-archive
- www.wordfence.com/threat-intel/vulnerabilities/id/e6b35dc7-bd1d…
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 13 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.