CVE-2026-55184

LOW 3.5

EspoCRM: Stored XSS in wysiwyg template fields if CSP is disabled

CVSS Score

3.5

EPSS Score

0.0%

EPSS Percentile

0th

EspoCRM is an open source customer relationship management application. Prior to 9.3.9, a user with Email Template or PDF Template edit permission can store crafted HTML that bypasses moderateSanitizeHtml(). When another user opens the template in edit mode and clientCspDisabled is true, the stored payload executes and can hijack the user's session. This issue is fixed in version 9.3.9.

CWE	CWE-79
Vendor	espocrm
Product	espocrm
Published	Oct 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

espocrm / espocrm

< 9.3.9

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/espocrm/espocrm/security/advisories/GHSA-x5p5-8mxj-9wv6 github.com: https://github.com/espocrm/espocrm/commit/67223bfb82338c030f38dac03f12c73b7b3d760f github.com: https://github.com/espocrm/espocrm/releases/tag/9.3.9