Auth bypass in Error311 Filerise
CVE-2026-33330
FileRise is a self-hosted web file manager / WebDAV server. Prior to version 3.10.0, a broken access control issue in FileRise's ONLYOFFICE integration allows an authenticated user with read-only access to obtain a signed save callbackUrl for a file and then directly forge the ONLYOFFICE save callback to overwrite that file with attacker-controlled content. This issue has been patched in version 3.10.0.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Error311 Filerise — versions < 3.10.0
- Filerise
Weakness classification (CWE)
References
- github.com/error311/FileRise/security/advisories/GHSA-6c3j-f4x4-36m3 (Exploit, Mitigation, Vendor Advisory)
- github.com/error311/FileRise/commit/3871f9fd1661688bed4f7dd23912be0ebf50973c (Patch)
- github.com/error311/FileRise/releases/tag/v3.10.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-33330?
- CVE-2026-33330 is a high-severity vulnerability in Error311 Filerise, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-03-24.
- How severe is CVE-2026-33330?
- High severity. CVSS v3 base score is 7.1 out of 10.