Cross-site scripting in EspoCRM - CVE-2026-33741
Published: May 11, 2026
Vulnerability identifier: #VU130976
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33741
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: EspoCRM
Affected software:
EspoCRM
EspoCRM
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary JavaScript in the victim's browser session.
The vulnerability exists due to cross-site scripting in the attachment and image entry points when serving uploaded SVG files as top-level inline documents that can load same-origin external scripts. A remote user can upload a crafted SVG and a second attacker-controlled JavaScript attachment, then trick a victim into opening the SVG to execute arbitrary JavaScript in the victim's browser session.
User interaction is required to open the crafted SVG, and exploitation is reachable through normal attachment-capable fields.
How to mitigate CVE-2026-33741
Install security update from vendor's website.