File Manager – 100% Free & Open Source File…: Deserialization of Untrusted Data
CVE-2022-47599 is a high-severity deserialization of untrusted data vulnerability in File Manager – 100% Free & Open Source File Manager Plugin for WordPress | Bit File Manager from File Manager by Bit Form Team, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected File Manager – 100% Free & Open Source File Manager Plugin for WordPress | Bit File Manager versions: 5.2.7 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.52% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update File Manager to 6.0.0 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| File Manager by Bit Form Team | File Manager – 100% Free & Open Source File Manager Plugin for WordPress | Bit File Manager | 5.2.7 and earlier | Not stated |
| Bitapps | File Manager | before 6.0.0 | 6.0.0 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 5.5 | Medium | CNA (patchstack.com) |
| CVSS 3.1 | 7.2 | High | NVD |
Official description
Deserialization of Untrusted Data vulnerability in File Manager by Bit Form Team File Manager – 100% Free & Open Source File Manager Plugin for WordPress | Bit File Manager.This issue affects File Manager – 100% Free & Open Source File Manager Plugin for WordPress | Bit File Manager: from n/a through 5.2.7.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
How developers prevent this class of flaw
- If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
- When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
- Explicitly define a final object() to prevent deserialization.
More Deserialization of Untrusted Data vulnerabilities (CWE-502)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
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