What’s Vulnerable › Vulnerabilities

CVE-2026-92616: FileRise < 3.28.0 Privilege Escalation via WebDAV Session Inheritance

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-09-16
• Weakness: CWE-613

Description

FileRise before version 3.28.0 contains a privilege escalation vulnerability that allows authenticated low-privilege attackers to gain unauthorized read and write access by exploiting improper session isolation between the WebDAV interface and the web application session context. Attackers can combine valid Basic-Auth credentials with an active admin PHPSESSID cookie to bypass authorization boundaries, as the WebDAV layer incorrectly inherits elevated privileges from an ambient web session rather than enforcing independent stateless authentication per RFC 4918.

Affected products

• error311 FileRise: before 3.28.0 — fixed in 3.28.0

How to fix

Upgrade to a fixed version: error311 FileRise 3.28.0. Check the vendor advisory for mitigations.

References

• https://github.com/error311/FileRise/releases/tag/v3.28.0
• https://www.vulncheck.com/advisories/filerise-privilege-escalation-via-webdav-session-inheritance

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