How severe is CVE-2025-53826?

CVE-2025-53826 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-53826 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-53826?

CVE-2025-53826 affects Filebrowser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-53826?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-53826 have an EU (EUVD) identifier?

Yes. CVE-2025-53826 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21540.

When was CVE-2025-53826 published?

CVE-2025-53826 was published on 2025-07-15 and last updated on 2026-06-17.

CVE-2025-53826

CVE-2025-53826 is a critical-severity vulnerability in Filebrowser with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-305.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 7.7
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-21540
Weakness: CWE-305
Affected product: Filebrowser
Published: 2025-07-15
Last modified: 2026-06-17

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. In version 2.39.0, File Browser’s authentication system issues long-lived JWT tokens that remain valid even after the user logs out. As of time of publication, no known patches exist.

Frequently asked questions

What is CVE-2025-53826?: File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename, and edit files. In version 2.39.0, File Browser’s authentication system issues long-lived JWT tokens that remain valid even after the user logs out. As of time of publication, no known patches exist.
How severe is CVE-2025-53826?: CVE-2025-53826 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-53826 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-53826?: CVE-2025-53826 affects Filebrowser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-53826?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-53826 have an EU (EUVD) identifier?: Yes. CVE-2025-53826 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21540.
When was CVE-2025-53826 published?: CVE-2025-53826 was published on 2025-07-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:filebrowser:filebrowser:2.39.0:*:*:*:*:*:*:*

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