CVE-2023-46611

YOP Poll <= 6.5.28 - Reusable Captcha via validateImage

2023-10-24 00:00

Strategic Overview

Status: Patched in 6.5.29
Affected Plugin: YOP Poll
Affected Version: <= 6.5.28
CVSS: 5.3Medium
Weakness type: CWE-804 · Guessable CAPTCHA
CVE: CVE-2023-46611

At a glance

CVE-2023-46611 is a medium-severity Guessable CAPTCHA vulnerability in the YOP Poll WordPress plugin, affecting versions <= 6.5.28. 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 6.5.29; sites on affected versions should update now. Disclosed October 2023, reported by qilin_99.

Vulnerability Overview

The YOP Poll plugin for WordPress is vulnerable to captcha bypass due to a reusable captcha bypass in the validateImage function in all versions up to, and including, 6.5.28. This makes it possible for unauthenticated attackers to vote multiple times using the same captcha image

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 6.5.29, 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: YOP Poll 6.5.29 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-46611 https://www.wordfence.com/threat-intel/vulnerabilities/id/33f8f75d-c57e-456c-a48a-82fa668adb1c https://nvd.nist.gov/vuln/detail/CVE-2023-46611

Related records

Other vulnerabilities in YOP Poll

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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