Unauthorized Data Modification in Yoast Duplicate Post Plugin for WordPress
CVE-2026-1217
What is CVE-2026-1217?
The Yoast Duplicate Post plugin for WordPress has a vulnerability that allows authenticated users with Contributor-level access and above to modify and duplicate posts without proper permissions. Specifically, a missing capability check on the clone_bulk_action_handler() and republish_request() functions permits these users to duplicate any post on the site, including private, draft, and trashed posts. Additionally, attackers with Author-level access can overwrite published posts with their content using the Rewrite & Republish feature, posing a significant risk to the integrity of site content.
Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.
Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.
Affected Version(s)
Yoast Duplicate Post * <= 4.5