CVE-2026-55184CWE-79cross-site-scripting

CVE-2026-55184

Low · published October 15, 2026

CVSS v3.1
3.5
EPSS
0%
Percentile
9.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.5 · LOW
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00202 · 9.6th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-15T19:17Z
References (3)
https://github.com/espocrm/espocrm/commit/67223bfb82338c030f38dac03f12c73b7b3d760f · [email protected]https://github.com/espocrm/espocrm/releases/tag/9.3.9 · [email protected]https://github.com/espocrm/espocrm/security/advisories/GHSA-x5p5-8mxj-9wv6 · [email protected]
EPSS history
Timeline
  • 17 OCT 03:32Z
    EPSS moved — → 0%
    epss
  • 15 OCT 14:48Z
    EspoCRM: Stored XSS in wysiwyg template fields if CSP is disabled
    cvelistv5
  • 15 OCT 14:48Z
    EspoCRM: Stored XSS in wysiwyg template fields if CSP is disabled
    cvelistv5