Quick answers
- Is CVE-2026-77034 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77034 being exploited in the wild.
- How severe is CVE-2026-77034?
- Informational severity, published 27 August 2026.
- Which products and versions are affected?
- Joomlaeventmanager.Net Joomla Event Manager < 5.0.1.
- Is there a fix for CVE-2026-77034?
- 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-2026-77034 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-77034?
- Check whether you run Joomlaeventmanager.Net Joomla Event Manager at an affected version. 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 authorization bypass in Joomla Event Manager's article handling. Any visitor holding their own session token can republish and overwrite articles associated with events without proper permission checks. The flaw affects versions prior to 5.0.1 and requires only that an attacker possess a valid session token (a low bar for unauthenticated or low-privilege users). Successful exploitation allows unauthorized content modification, defacement, or injection of malicious content into event-related articles. The vulnerability has been patched in version 5.0.1.
Affected products
- joomlaeventmanager.net Joomla Event Manager < 5.0.1
Timeline
- 2026-08-27: disclosed
- 2026-09-14: patched: Fixed in JEM 5.0.1