Is this vulnerability remotely exploitable over the network?

Yes. Any authenticated user who can access the FileRise web interface and interact with documents via ONLYOFFICE can potentially exploit this issue, provided they can obtain a valid save callback URL. The exploitation occurs over standard HTTP(S) requests.

What level of access does an attacker need to exploit this?

The attacker must have a valid account and at least read-only access to the target file. No elevated administrative privileges are required; the flaw specifically enables users with limited rights to perform unauthorized write operations.

What is the safest general fix pattern?

The safest approach is to ensure that all file write operations, including those invoked through ONLYOFFICE callbacks, perform robust server-side authorization checks tied to the current user and their role. Signed callback URLs should not be treated as sufficient proof of write permission; instead, they should be one component in a broader, context-aware authorization decision.

Severity:

HIGH RISK

(7.1)

Broken Access Control (CWE-863) in FileRise ONLYOFFICE Integration

CVE-2026-33330

Published:

Mar 24, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Broken Access Control

CWE:

CWE-863

Impact:

Unauthorized File Modification and Data Integrity Violation

Severity:

HIGH RISK

(7.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Broken Access Control

CWE:

CWE-863

Impact:

Unauthorized File Modification and Data Integrity Violation

Severity:

HIGH RISK

(7.1)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Broken Access Control (CWE-863) in FileRise ONLYOFFICE Integration

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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