Vulnerability · Published Oct 15, 2026 · Assigned by GitHub_M

CVE-2026-55184EspoCRM: Stored XSS in wysiwyg template fields if CSP is disabled

Low 3.5

In plain English

A low-severity cross-site scripting in espocrm from espocrm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 3.1)3.5Low

Exploit odds (30 days)0.2%top 89.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
espocrm	espocrm	< 9.3.9

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

References

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