Is CVE-2026-77035 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-77035 being exploited in the wild.

How severe is CVE-2026-77035?

Informational severity, with a CVSS score of 6.5, published 27 August 2026.

Which products and versions are affected?

JEM Project Joomla Event Manager < 5.0.1.

Is there a fix for CVE-2026-77035?

A patch was published on 2026-09-14: Fixed in JEM 5.0.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-77035 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-77035?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-77035: Joomla Event Manager privilege escalation in form submission

Q: Is there a fix for CVE-2026-77035?

A patch was published on 2026-09-14: Fixed in JEM 5.0.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-77035 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-77035?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-77035 · Severity: info · CVSS 6.5 · Published 2026-08-27

Joomla Event Manager is an extension for managing events and venues in Joomla websites. A user with basic event-editing permissions can exploit a flaw in form handling to take over events and venues created by other users by manipulating form fields to claim ownership of those records. This allows unauthorized users to modify or delete other users' event data.

Quick answers

Is CVE-2026-77035 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-77035 being exploited in the wild.
How severe is CVE-2026-77035?: Informational severity, with a CVSS score of 6.5, published 27 August 2026.
Which products and versions are affected?: JEM Project Joomla Event Manager < 5.0.1.
Is there a fix for CVE-2026-77035?: A patch was published on 2026-09-14: Fixed in JEM 5.0.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-77035 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-77035?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an insecure direct object reference and privilege escalation flaw in the form submission handling. A registered user with edit-own rights (core.edit.own capability or eventowner=1 setting) can POST another user's record ID together with their own ID in the created_by field, allowing them to claim ownership and take over events and venues. The flaw exists because the application fails to properly validate that the user submitting the form is authorized to edit that specific record. The vulnerability affects Joomla Event Manager versions before 5.0.1, and is fixed in version 5.0.1.

Affected products

JEM Project Joomla Event Manager < 5.0.1

Timeline

2026-08-27: disclosed
2026-09-14: patched: Fixed in JEM 5.0.1

References

https://www.joomlaeventmanager.net/

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