CVE-2026-126306

CVSS 8.6 (high) · published 2026-11-13

EspoCRM before 9.3.11 and 10.x before 10.0.8 contains a stored cross-site scripting vulnerability that allows low-privileged users to upload crafted SVG images that submit authenticated POST requests to arbitrary backend endpoints. Attackers can trick an administrator into opening the SVG in a separate browser tab and clicking it, performing administrator actions such as elevating the attacker's account to administrator.

Weakness: CWE-79

Source: NVD CVE-2026-126306

References

• https://github.com/espocrm/espocrm/security/advisories/GHSA-4qv5-q4g7-hp5r
• https://www.vulncheck.com/advisories/espocrm-before-10.0.8-stored-xss-via-malicious-svg-attachment

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