123ContactForm for WordPress <= 1.5.6 - Arbitrary Post Creation
Strategic Overview
- Status
- Unpatched
- Affected Plugin
- 123ContactForm for WordPress
- Affected Version
<= 1.5.6- CVSS
- 7.5High
- Weakness type
- CWE-285 · Improper Authorization
- CVE
CVE pending
At a glance
This record tracks a high-severity Improper Authorization vulnerability in the 123ContactForm for WordPress WordPress plugin, affecting versions <= 1.5.6. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high integrity impact). Exploitation requires no authentication. No fixed release has been reported yet; treat installations running this software as exposed. Disclosed January 2021, reported by Rodrigo Escobar (ipax).
Vulnerability Overview
The 123ContactForm for WordPress plugin for WordPress is vulnerable to Arbitrary Post Creation in versions up to, and including, 1.5.6. This is due to incorrect signature validation on the cfp_new_post function. This makes it possible for unauthenticated attackers to create arbitrary posts.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on integrity.
CWE-285: Improper Authorization
Reaching this weakness in 123ContactForm for WordPress <= 1.5.6 takes a caller who can reach the endpoint. Improper authorization means a permission check exists but does not cover the case being exercised, so a caller who is allowed to do one thing is allowed to do a neighbouring thing as well.
A lower-privileged account performs an action reserved for a higher one, which on a multi-author or membership site means an ordinary user reaching administrative behaviour. No fixed build of this plugin is recorded for 123ContactForm for WordPress yet, so installs running <= 1.5.6 stay exposed until the vendor ships one.
Remediation
No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. No patched version is recorded yet, which is the case where a filtering layer matters most, because there is nothing to update to.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in 123ContactForm for WordPress
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