Quick answers
- Is CVE-2026-33741 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-33741 being exploited in the wild.
- How severe is CVE-2026-33741?
- Medium severity, with a CVSS score of 6.8, published 19 May 2026.
- Which products and versions are affected?
- Espocrm <= 9.3.3.
- Is there a fix for CVE-2026-33741?
- 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-2026-33741 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-33741?
- Check whether you run Espocrm 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 stored cross-site scripting (XSS) vulnerability exists in EspoCRM versions <= 9.3.3 due to improper handling of SVG uploads and a permissive Content Security Policy (CSP). While the application's CSP (default-src 'self') blocks inline scripts within SVGs, it fails to define a restrictive script-src, thereby allowing the execution of external scripts from the same origin. An attacker can exploit this by uploading a malicious JavaScript file as a standard attachment and then uploading an SVG that references that script via the 'entryPoint=download' URL. When a victim views the SVG through the attachment or image entry points, the browser renders it as a top-level document and executes the attacker's script within the EspoCRM origin. This issue is fixed in version 9.3.4.
Affected products
- EspoCRM EspoCRM <= 9.3.3
Timeline
- 2026-05-08: advisory: Vendor advisory published on GitHub
- 2026-05-19: disclosed: CVE published to NVD