Installing the Fix for an Exploited WordPress Flaw Can Expose Some Sites One Last Time
A Picus Security researcher found that WordPress's update mechanism temporarily re-exposes the very flaw it is patching — meaning sites are briefly vulnerable during installation, not just before it.
Summary written by editorial AI · Source link below
Some WordPress sites can still be attacked while they install the fix for an actively exploited flaw, according to Umut Bayram, the Picus Security researcher who found it.
The update that installs the fix still unpacks its files using the site's old, unpatched code, so an attacker who strikes at the right moment can run code on the server. The researcher advises blocking web access to the
Editorial Analysis
Framed for the DevSecOps Engineer desk
The finding reveals a systemic flaw in WordPress's update mechanism: the update unpacks using the old vulnerable code, creating a transient but exploitable window for every affected site.
For managed WordPress fleets, script updates to occur in maintenance windows with concurrent WAF protection, or use staging environments to pre-apply and verify patches.
WordPress's own update process temporarily re-opens the vulnerability it fixes, requiring compensating controls during enterprise-wide patch rollouts.
Forward-looking interpretation drafted by editorial AI under human review — not a reproduction of the source. See methodology.
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