Low severity · published Oct 15, 2026
CVE-2026-53575
EspoCRM: Persistent XSS via CSP nonce injection in applicationName setting by admin user
2.7
CVSS
0.2%
EPSS
No
On KEV
Description
EspoCRM is an open source customer relationship management application. Prior to 9.3.9, an authenticated administrator can place crafted content in the applicationName setting through CSP nonce injection. The persistent injection is inserted into the main application page without escaping, allowing attacker-controlled JavaScript to run in users' sessions and leak page data, including unsaved user input. This issue is fixed in version 9.3.9.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% 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-2026-53575
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53575
github.com
https://github.com/espocrm/espocrm/commit/ce73338ea7b463914e1271f16f8f73131ace886f
github.com
https://github.com/espocrm/espocrm/releases/tag/9.3.9
github.com
https://github.com/espocrm/espocrm/security/advisories/GHSA-f34h-xxmv-j9xp
More from espocrm
9.1
CVE-2026-47168
EspoCRM: Authenticated RCE via Unsafe PHP Object Deserialization in MassAction/Export params
9.1
CVE-2026-33656
EspoCRM vulnerable to authenticated RCE via Formula with path traversal in attachment `sourceId`, exploitable by admin user
8.8
CVE-2022-38843
EspoCRM version 7.1.8 is vulnerable to Unrestricted File Upload allowing attackers to upload malicious file with any extension to the server
8.8
CVE-2019-14351
EspoCRM 5.6.4 is vulnerable to user password hash enumeration
8.5
CVE-2025-32390
EspoCRM is a free, open-source customer relationship management platform