Vulnerability · Published Aug 13, 2026 · Assigned by VulnCheck

CVE-2026-73533Ninja Tables Pro 5.2.11 Embedded Malicious Code via Tampered Plugin Build

Critical 9.8

In plain English

A critical-severity security flaw in Ninja Tables Pro from WPManageNinja. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.6%top 48.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Ninja Tables Pro 5.2.11 contains an embedded malicious code vulnerability introduced via a tampered plugin build served through a decommissioned update server. The tampered build introduced a rogue PHP file (app/Library/updater/NinjaTableDataSync.php) that established a backdoor REST API endpoint, dropped persistent PHP files in mu-plugins and uploads directories, installed a passwordless administrator account, and registered scheduled tasks that survived plugin removal.

Affected products (as reported)

Vendor	Product	Versions
WPManageNinja	Ninja Tables Pro	5.2.11

Weakness: CWE-506 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

WPManageNinja Security Incident technical-description
WP Plugin Page product
https://www.vulncheck.com/advisories/ninja-tables-pro-embedded-malicious-code-via-tampered-plugin-build third-party-advisory