WordPress 4.5.5
WordPress 4.5.5 has 129 disclosed vulnerabilities in the WordSec catalog, reported between 2012 and 2025; all 129 are fixed as of August 2026. Their average CVSS score is 6.3, and the most serious one scores 9.8 out of 10. Severity breakdown: 5 critical and 28 high. 2017 was the busiest year with 33 disclosures.
The most common weakness is Cross-Site Scripting, behind 51 of the records (40%). Other recurring categories include Improper Authorization, Exposure Of Sensitive Information To An Unauthorized Actor.
Every one of the 129 issues recorded for WordPress 4.5.5 has a vendor fix available, so running the current release closes all known holes.
74 independent researchers contributed these findings, most of them (10) reported by Simon Scannell.
WordPress Core < 6.0.3 - SQL Injection via WP_Date_Query
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