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CVE-2025-52892— EspoCRM is vulnerable to access denial through double slash in URI corrupting router cache

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EspoCRM开源的一套开源的基于Web的客户关系管理系统（CRM）。该系统提供销售自动化、社区和客户支持等功能。 EspoCRM 9.1.6及之前版本存在环境问题漏洞，该漏洞源于双斜杠导致Slim路由器缓存损坏，可能导致实例不可用。

CVSS 4.5 · Medium EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2025-52892

Vulnerability Information
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Vulnerability Title
EspoCRM is vulnerable to access denial through double slash in URI corrupting router cache
Source: CVE Program / CVE List V5
Vulnerability Description
EspoCRM is a web application with a frontend designed as a single-page application and a REST API backend written in PHP. In versions 9.1.6 and below, if a user loads Espo in the browser with double slashes (e.g https://domain//#Admin) and the webserver does not strip the double slash, it can cause a corrupted Slim router's cache. This will make the instance unusable until there is a completed rebuild. This is fixed in version 9.1.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
EspoCRM 环境问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
EspoCRM是EspoCRM开源的一套开源的基于Web的客户关系管理系统（CRM）。该系统提供销售自动化、社区和客户支持等功能。 EspoCRM 9.1.6及之前版本存在环境问题漏洞，该漏洞源于双斜杠导致Slim路由器缓存损坏，可能导致实例不可用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
espocrm espocrm < 9.1.7 -

II. Public POCs for CVE-2025-52892

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III. Intelligence Information for CVE-2025-52892

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Patches & Fixes for CVE-2025-52892 (1)

IV. Related Vulnerabilities

Same product: espocrm
Same vendor: espocrm
Same weakness: CWE-444

V. Comments for CVE-2025-52892

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