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

Quick assessment

Affected
espocrm espocrm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

EspoCRM 是一款开源客户关系管理（CRM）应用。在 9.3.9 版本之前，经过身份验证的管理员可以通过 CSP nonce 注入，在 设置中植入构造恶意内容。该持久性注入内容会被直接插入到主应用页面中而未经过转义处理，导致攻击者控制的 JavaScript 代码能够在用户会话中执行，从而泄露页面数据，包括用户未保存的输入内容。此问题已在 9.3.9 版本中得到修复。

CVSS 2.7 · Low EPSS 0.22% · P12

Affected Version Matrix 1

VendorProduct Version RangeStatus
espocrm espocrm < 9.3.9 affected
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I. Basic Information for CVE-2026-53575

Vulnerability Information
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Vulnerability Title
EspoCRM: Persistent XSS via CSP nonce injection in applicationName setting by admin user
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
espocrm espocrm < 9.3.9 -

II. Public POCs for CVE-2026-53575

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III. Intelligence Information for CVE-2026-53575

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Patches & Fixes for CVE-2026-53575 (1)

Vendor Advisories for CVE-2026-53575 (1)

Vendor Pages for CVE-2026-53575 (1)

Same Patch Batch · espocrm · 2026-10-15 · 12 CVEs total

CVE-2026-47168 9.1 CRITICAL EspoCRM: Authenticated RCE via Unsafe PHP Object Deserialization in MassAction/Export para
CVE-2026-53574 7.6 HIGH EspoCRM: Blind SQL injection via streamAttachments where-clause complex expression
CVE-2026-46691 6.5 MEDIUM EspoCRM: IDOR in Import exportErrors Endpoint Leaks CSV Data of Other Users
CVE-2026-46694 6.5 MEDIUM EspoCRM: Portal User ACL Bypass Exposes Internal Stream Notes
CVE-2026-77460 6.5 MEDIUM EspoCRM: Mass email template renderer leaks restricted record fields
CVE-2026-75505 6.0 MEDIUM EspoCRM: Access control bypass in Mass Update letting regular user with Mass Update permis
CVE-2026-63130 5.5 MEDIUM EspoCRM: Admin path traversal in LabelManager (Custom Label saving) allows arbitrary `.jso
CVE-2026-55154 5.4 MEDIUM EspoCRM: CSV/Formula Injection sanitizer bypass via leading whitespace/control characters
CVE-2026-46708 4.3 MEDIUM EspoCRM: Target list Opt-Out actions allows opting out record without access Target List a
CVE-2026-59994 4.3 MEDIUM EspoCRM: Pre-authentication stored HTML injection in stream notification emails about emai
CVE-2026-55184 3.5 LOW EspoCRM: Stored XSS in wysiwyg template fields if CSP is disabled

IV. Related Vulnerabilities

Same product: espocrm
Same vendor: espocrm
Same weakness: CWE-79

V. Comments for CVE-2026-53575

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