Quick answers
- Is CVE-2026-83555 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-83555 being exploited in the wild.
- How severe is CVE-2026-83555?
- Medium severity, with a CVSS score of 5.3, published 23 September 2026.
- Which products and versions are affected?
- Icegram Email Subscribers & Newsletters before 5.9.35.
- Is there a fix for CVE-2026-83555?
- A patch was published on 2026-09-23: Version 5.9.35 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-83555 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-83555?
- Check whether you run Icegram Email Subscribers & Newsletters 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 plugin lacks proper token verification for the subscription status change endpoint before version 5.9.35, allowing unauthenticated access to alter subscriber status. An attacker can change any subscriber's confirmation state (subscribe/unsubscribe) by providing only the email address, exploiting missing access controls (CWE-862). The vulnerability requires knowledge of a valid subscriber email but no authentication, and is easily exploitable via HTTP request to the vulnerable endpoint.
Affected products
- Icegram Email Subscribers & Newsletters before 5.9.35
Timeline
- 2026-09-21: disclosed
- 2026-09-23: patched: Version 5.9.35 released