The WP Remote WordPress Plugin, Malcare Security, and BlogVault Backup & Staging < 6.65 - Unauthenticated Site Takeover via Brute Force
Strategic Overview
- Status
- Patched in 6.65
- Affected Version
< 6.65- CVSS
- 9.8Critical
- Weakness type
- CWE-338 · Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
- CVE
CVE-2026-19718
At a glance
CVE-2026-19718 is a critical-severity Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) vulnerability in the MalCare WordPress Security Plugin WordPress plugin, affecting versions < 6.65. It carries a CVSS score of 9.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 6.65; sites on affected versions should update now. Disclosed August 2026, reported by Jakub Herman.
Vulnerability Overview
Multiple plugins for WordPress are vulnerable to unauthenticated site takeover in various versions. This is due to a weak pseudo-random number generator that makes it possible for attackers to brute force and connect to the remote connection feature. This makes it possible for unauthenticated attackers to connect a site to their remote management software and take it over.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.
CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.
Remediation
Update to version 6.65, or a newer patched version
How does WordSec protect against this?
This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: MalCare WordPress Security Plugin 6.65 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in MalCare WordPress Security Plugin – Malware Scanner, Cleaner, Security Firewall
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