Quick answers
- Is CVE-2026-18720 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18720 being exploited in the wild.
- How severe is CVE-2026-18720?
- Medium severity, with a CVSS score of 5.3, published 4 August 2026.
- Which products and versions are affected?
- Kalcaddle Kodbox 1.67 Build 02.
- Is there a fix for CVE-2026-18720?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-18720 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-18720?
- Check whether you run Kalcaddle Kodbox 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
This is an authorization bypass vulnerability (CWE-862: Missing Authorization) in the msgWarning plugin's configuration APIs accessible via /index.php?plugin/msgWarning/action. The plugin's getConfig and setConfig actions do not enforce authentication or administrator authorization, despite the global plugin route excluding login checks. An unauthenticated attacker can send GET requests to read SMTP credentials (host, email, password) or POST requests to modify them. No authentication or user interaction is required; the attack is remotely exploitable via network HTTP requests. Exploitation enables credential theft, SMTP server hijacking, and disruption of critical email-dependent functionality like password resets and notifications.
Affected products
- kalcaddle kodbox 1.67 Build 02
Timeline
- 2026-06-15: disclosed: Vulnerability reported via GitHub
- 2026-08-04: advisory: Published on NVD