Ninja Forms Contact Form – The Drag and Drop…: Deserialization of Untrusted Data
CVE-2022-2903 is a high-severity deserialization of untrusted data vulnerability in Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress, 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. The record lists version 3.6.13 as the first without the flaw, so updating Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.45% chance of exploitation within 30 days, higher than 74% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress to 3.6.13 or a later version.
- Update Ninja Forms to 3.6.13 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress | Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress | 3.6.13 up to, but not including, 3.6.13 | 3.6.13 |
| Ninjaforms | Ninja Forms | before 3.6.13 | 3.6.13 |
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 | 7.2 | High | NVD |
| CVSS 3.1 | 7.2 | High | CISA (ADP) |
Official description
The Ninja Forms Contact Form WordPress plugin before 3.6.13 unserialises the content of an imported file, which could lead to PHP object injections issues when an admin import (intentionally or not) a malicious file and a suitable gadget chain is present on the blog.
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: poc, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- wpscan.com/vulnerability/255b98ba-5da9-4424-a7e9-c438d8905864Exploit, Third Party Advisory
Recent Deserialization of Untrusted Data vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 8.8 High severity
- 9.1 Critical severity
- 9.8 Critical severity
- 7.8 High severity
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