CVE-2026-61504: Rejetto HFS < 3.2.1 Stored XSS via File Names in Basic Web Listing

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-13 · updated 2026-10-24
Weakness: CWE-79

Description

Rejetto HFS 3.0.0 through 3.2.0 does not escape file names in its fallback "basic" web listing, and this listing can be forced by any browser via the ?get=basic parameter. A user with upload permission - or an anonymous user on servers with an open upload folder - can store a file whose name contains script that executes in the browser of anyone viewing the listing.

Affected products

rejetto hfs: from 3.0.0 before 3.2.1 — fixed in 3.2.1

How to fix

Upgrade to a fixed version: rejetto hfs 3.2.1. Check the vendor advisory for mitigations.

References

https://github.com/rejetto/hfs/releases/tag/v3.2.1
https://www.vulncheck.com/advisories/rejetto-hfs-stored-xss-via-file-names-in-basic-web-listing

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