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CVE-2025-52902

Filebrowser cross-site scripting (XSS)

7.6 HIGHPublic exploitEPSS 0.33%
  1. Published26 Jun 2025

Description

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. The Markdown preview function of File Browser prior to v2.33.7 is vulnerable to Stored Cross-Site-Scripting (XSS). Any JavaScript code that is part of a Markdown file uploaded by a user will be executed by the browser. Version 2.33.7 contains a fix for the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Affected products

Filebrowser< 2.33.7

Remediation

Fixed in
Filebrowser≥ 2.33.7

References

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Frequently asked

Is CVE-2025-52902 being actively exploited?

CVE-2025-52902 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.33%.

How severe is CVE-2025-52902?

CVE-2025-52902 has a CVSS 3.1 base score of 7.6, rated high. EPSS estimates a 0.33% probability of exploitation.

Which products are affected by CVE-2025-52902?

Affected products include Filebrowser.

How do I fix CVE-2025-52902?

Upgrade affected software to a fixed version, for example Filebrowser 2.33.7 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-52902 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.