Low severity · published Oct 15, 2026
CVE-2026-55184
EspoCRM: Stored XSS in wysiwyg template fields if CSP is disabled
3.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ES
espocrm · espocrm
< 9.3.9 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55184
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-55184
github.com
https://github.com/espocrm/espocrm/commit/67223bfb82338c030f38dac03f12c73b7b3d760f
github.com
https://github.com/espocrm/espocrm/releases/tag/9.3.9
github.com
https://github.com/espocrm/espocrm/security/advisories/GHSA-x5p5-8mxj-9wv6
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EspoCRM is a free, open-source customer relationship management platform