What’s Vulnerable › Vulnerabilities

CVE-2026-53575: EspoCRM: Persistent XSS via CSP nonce injection in applicationName setting by admin user

• Severity: low (CVSS 2.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-15 · updated 2026-10-15
• Weakness: CWE-79

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.

Affected products

• espocrm: before 9.3.9

References

• https://github.com/espocrm/espocrm/commit/ce73338ea7b463914e1271f16f8f73131ace886f
• https://github.com/espocrm/espocrm/releases/tag/9.3.9
• https://github.com/espocrm/espocrm/security/advisories/GHSA-f34h-xxmv-j9xp

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