CVE-2025-52892: espocrm Request Smuggling — Fix

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.

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CVSS v3.1 Score

4.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-444 CWE-444

Affected Products

Vendor	Product	Versions
espocrm	espocrm	< 9.1.7

References

Advisories & Patches

https://github.com/espocrm/espocrm/commit/929611f317ce8892ea75873b0ab3094c0c510ff3 https://github.com/espocrm/espocrm/security/advisories/GHSA-26x2-6wch-j8pf

Frequently Asked Questions

What is CVE-2025-52892? +

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. It has a CVSS v3.1 base score of 4.5 (MEDIUM).

How severe is CVE-2025-52892? +

CVE-2025-52892 has a CVSS v3.1 score of 4.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-52892? +

CVE-2025-52892 affects products from espocrm, specifically: espocrm. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-52892? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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