Quick answers
- Is CVE-2026-84898 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-84898 being exploited in the wild.
- How severe is CVE-2026-84898?
- Medium severity, with a CVSS score of 6.6, published 5 September 2026.
- Which products and versions are affected?
- Eventin Eventin before 4.1.21.
- Is there a fix for CVE-2026-84898?
- A patch was published on 2026-09-03: Fixed in version 4.1.21 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-84898 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-84898?
- 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 plugin fails to properly validate the event_layout template path parameter before using it in a PHP include statement, resulting in a local file inclusion (LFI) vulnerability. An authenticated attacker with contributor-level access or above can craft a malicious event creation request via the REST API (/wp-json/eventin/v2/events) with a traversal payload in the event_layout field (e.g., "../../../../uploads/YYYY/MM/marker"). When the event page is rendered, the unsanitized path is included and executed as PHP code. Exploitation requires: (1) an active contributor account, (2) a theme with Eventin template-override support, and (3) a target PHP file already present on the server. The vulnerability is fixed in version 4.1.21.
Affected products
- Eventin Eventin before 4.1.21
Timeline
- 2026-09-03: disclosed
- 2026-09-03: patched: Fixed in version 4.1.21
- 2026-09-05: advisory