Quick answers
- Is CVE-2026-100522 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-100522 being exploited in the wild.
- How severe is CVE-2026-100522?
- Medium severity, with a CVSS score of 6.1, published 26 September 2026.
- Which products and versions are affected?
- Cotonti through 1.0.0.
- Is there a fix for CVE-2026-100522?
- 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-2026-100522 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-100522?
- Check whether you run Cotonti 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
A reflected XSS vulnerability exists in message.php where the lng parameter is not properly HTML-escaped before being output in a confirmation dialog. The vulnerability is exploitable via a crafted URL and requires no authentication or user interaction beyond clicking a malicious link. Attackers can execute arbitrary JavaScript in the victim's browser context to steal sensitive data or perform unauthorized actions.
Affected products
- Cotonti Cotonti through 1.0.0
Timeline
- 2026-09-26: disclosed