CVE-2026-33741

Description

EspoCRM is an open source customer relationship management application. Versions 9.3.3 and below allow authenticated users to upload SVG attachments through normal attachment-capable fields and later serve those SVG files as top-level inline documents through both the attachment and image entry points, resulting in stored cross-user XSS reachable through a normal attachment workflow. Although inline SVG script is blocked by the response CSP, the same CSP still allows same-origin external script. As a result, an attacker can upload a malicious SVG together with a second attacker-controlled JavaScript attachment, then trick another user into opening the SVG to execute JavaScript in the victim's EspoCRM origin. This issue has been fixed in version 9.3.4.

Source: NVD

References

• [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-33741
• [Other]https://github.com/espocrm/espocrm/security/advisories/GHSA-5wh5-ccv2-m3pv
• [Other]https://github.com/espocrm/espocrm/security/advisories/GHSA-5wh5-ccv2-m3pv

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