CVE-2020-36836
Published: April 11, 2026
Official Description
The WP Fastest Cache plugin for WordPress is vulnerable to unauthorized arbitrary file deletion in versions up to, and including, 0.9.0.2 due to a lack of capability checking and insufficient path validation. This makes it possible for authenticated users with minimal permissions to delete arbitrary files from the server.
Risk Analysis
The WP Fastest Cache plugin for WordPress is vulnerable to unauthorized arbitrary file deletion, allowing authenticated users with minimal permissions to delete files from the server. This vulnerability is actively exploited, as confirmed by its presence in the CISA KEV catalog, posing a risk of site disruption.
This vulnerability is actively exploited in the wild. Attackers require authenticated access, even with minimal permissions, to exploit this flaw.
Update the WP Fastest Cache plugin to a version beyond 0.9.0.2. Implement strict file permissions and regularly back up your WordPress site to recover from potential data loss.
Technical Analysis
CVE-2020-36836 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2020-36836 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-36836 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1