CVE-2026-4299 Missing authorization in MainWP Child Reports
Authenticated subscribers can access sensitive activity logs via the Heartbeat API due to missing authorization checks in the MainWP Child Reports plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4299?
CVE-2026-4299 is a medium-severity missing authorization vulnerability in MainWP Child Reports, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The MainWP Child Reports plugin for WordPress is vulnerable to Missing Authorization in all versions up to and including 2.2.6. This is due to a missing capability check in the heartbeat_received() function in the Live_Update class. This makes it possible for authenticated attackers, with Subscriber-level access and above, to obtain MainWP Child Reports activity log entries (including action summaries, user information, IP addresses, and contextual data) via the WordPress Heartbeat API by sending a crafted heartbeat request with the 'wp-mainwp-stream-heartbeat' data key.
Weakness: CWE-862
Which versions are affected by CVE-2026-4299?
How do I fix CVE-2026-4299?
No fix has been published for CVE-2026-4299 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-4299 being exploited?
There is no known exploitation of CVE-2026-4299 in the wild and no public exploit code.
Sources
Also known as GHSA-xg9f-423r-vcp9.