Cross-site scripting in EspoCRM - CVE-2026-126305
Published: November 9, 2026 / Updated: November 13, 2026
Vulnerability identifier: #VU162633
CSH Severity: Low
CVSS v4: 5.1 [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]
CVE-ID: CVE-2026-126305
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a low-privileged attacker to create an administrator account with attacker-chosen credentials in EspoCRM.
The vulnerability exists due to improper neutralization of crafted links in Knowledge Base articles, allowing attached JavaScript to execute in an administrator's session when clicked. A low-privileged attacker with create or edit access to the Knowledge Base scope can attach a JavaScript file and link to it in an article body to obtain administrator access.
Affected software
EspoCRM
How to mitigate CVE-2026-126305
Install security update from vendor's website.
EspoCRM - addressed in versions 9.3.11, 10.0.9