CVE-2026-55184 Details
Description
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.
A stored cross-site scripting vulnerability has been identified in EspoCRM versions prior to 9.3.9. The issue arises in the Email Template and PDF Template fields, where a user with editing permissions can inject malicious HTML that bypasses the application's HTML sanitization process. If the template is opened by another user with Content Security Policy disabled, the injected script executes, potentially hijacking the user's session.
Users can upgrade to EspoCRM version 9.3.9 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 15, 2026CISA-ADP
Assessed Oct 15, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/espocrm/espocrm/commit/67223bfb82338c030f38dac03f12c73b7b3d760f | [email protected] | Source CodeVendor |
| https://github.com/espocrm/espocrm/releases/tag/9.3.9 | [email protected] | Release NotesVendor |
| https://github.com/espocrm/espocrm/security/advisories/GHSA-x5p5-8mxj-9wv6 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| EspoCRM | <= 9.3.8 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 15, 2026 | CVE Modified | CISA-ADP |
| Oct 15, 2026 | New CVE Received | [email protected] |