High severity · published Mar 24, 2026
CVE-2026-33330
FileRise ONLYOFFICE integration allows read-only users to overwrite files via forged save callback
7.1
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
FileRise · error311
< 3.10.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33330
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33330
Patch
https://github.com/error311/FileRise/commit/3871f9fd1661688bed4f7dd23912be0ebf50973c
Product
https://github.com/error311/FileRise/releases/tag/v3.10.0
Exploit
https://github.com/error311/FileRise/security/advisories/GHSA-6c3j-f4x4-36m3
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