Quick answers
- Is CVE-2026-83544 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-83544 being exploited in the wild.
- How severe is CVE-2026-83544?
- Medium severity, with a CVSS score of 6.8, published 5 September 2026.
- Which products and versions are affected?
- Greenshift before 13.2.0.
- Is there a fix for CVE-2026-83544?
- A patch was published on 2026-09-05: Fix released in version 13.2.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-83544 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-83544?
- Check whether you run Greenshift 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 a stored cross-site scripting (XSS) flaw in the block animation feature (CWE-79). The root cause is improper HTML escaping of the animation.customProps, animation.customPropsM, and animation.multianimations attributes before they are output in HTML attributes. An authenticated user with contributor-level or higher privileges can craft a malicious post via the REST API containing a Greenshift block with a payload that breaks out of the attribute context (e.g., x" onmouseover=alert(document.domain) style=position:fixed;inset:0 y="). When an editor, administrator, or any site visitor views the post, the injected JavaScript executes in their browser. The plugin versions affected are 13.1.9 and earlier; the fix is available in version 13.2.0.
Affected products
- Greenshift Greenshift before 13.2.0
Timeline
- 2026-09-03: disclosed
- 2026-09-05: patched: Fix released in version 13.2.0
- 2026-09-05: advisory