CVE-2026-77035 Missing authorization in JEM - Joomla Event Manager extension for Joomla
A registered user can take over other users' events and venues by forging form fields, allowing unauthorized modification of records.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77035?
CVE-2026-77035 is a medium-severity missing authorization vulnerability in joomlaeventmanager.net JEM - Joomla Event Manager extension for Joomla, published on 27 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Joomla Extension - joomlaeventmanager.net - Cross-user event and venue takeover through forged form fields in Joomla Event Manager < 5.0.1 - A registered user with edit-own rights (the eventowner=1 setting or core.edit.own) can POST another user's record id together with their own id as created_by and take over that record.
Weakness: CWE-639
Which versions are affected by CVE-2026-77035?
How do I fix CVE-2026-77035?
No fix has been published for CVE-2026-77035 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-2026-77035 being exploited?
There is no known exploitation of CVE-2026-77035 in the wild and no public exploit code.
Sources
Also known as GHSA-chh3-v86w-gm49.