CformsII <= 14.10.1 - CAPTCHA Bypass

2010-12-15 00:00

Strategic Overview

Status: Patched in 14.11
Affected Plugin: cformsII
Affected Version: <= 14.10.1
CVSS: 5.3Medium
Weakness type: CWE-804 · Guessable CAPTCHA
CVE: CVE pending

At a glance

This record tracks a medium-severity Guessable CAPTCHA vulnerability in the cformsII WordPress plugin, affecting versions <= 14.10.1. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 14.11; sites on affected versions should update now. Disclosed December 2010, reported by TheLightCosine.

Vulnerability Overview

The CformsII plugin for WordPress is vulnerable to CAPTCHA Bypass in versions up to, and including, 14.10.1. This is due to the codes not being one-time use and improper verification of user-supplied data. This makes it possible for unauthenticated attackers to bypass the Captcha Verification.

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.

CWE-804: Guessable CAPTCHA

The product uses a CAPTCHA challenge, but the challenge can be guessed or automatically recognized by a non-human actor.

Remediation

Update to version 14.11, or a newer patched version

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. None of that substitutes for the fix: cformsII 14.11 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/4bc58312-ef3d-487b-87fb-9a15a8c6559f

Related records

Other vulnerabilities in cformsII

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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