YOP Poll <= 6.5.28 - Reusable Captcha via validateImage

5.3
Guessable CAPTCHA
CVE CVE-2023-46611
CVSS 5.3 (Medium)
Publicly Published October 24, 2023
Last Updated January 22, 2024
Researcher qilin_99

Description

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

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Vulnerability Details for YOP Poll

Software Type Plugin
Software Slug yop-poll (view on wordpress.org)
Patched? Yes
Remediation Update to version 6.5.29, or a newer patched version
Affected Version
  • <= 6.5.28
Patched Version
  • 6.5.29

Recent vulnerabilities in YOP Poll

# Title CVE ID CVSS Researchers Date
1 YOP Poll <= 6.5.38 - Missing Authorization CVE-2025-64370 5.3 Que Thanh Tuan - Blue Rock November 2, 2025
2 YOP Poll <= 6.5.37 - Unauthenticated Stored Cross-Site Scripting CVE-2025-62040 7.2 Tran Nguyen Bao Khanh October 12, 2025
3 YOP Poll <= 6.5.26 - Race Condition to Vote Manipulation CVE-2023-6109 5.3 RIN MIYACHI November 13, 2023
4 YOP Poll <= 6.4.2 - IP Spoofing via X-Forwarded-For header CVE-2022-1600 5.3 Daniel Ruf July 11, 2022
5 YOP Poll <= 6.3.4 - Author+ Stored Cross-Site Scripting CVE-2022-0205 6.4 R3N0 February 14, 2022
6 YOP Poll <= 6.3.0 - Author+ Stored Cross-Site Scripting via Preview Module CVE-2021-24833 5.4 Vishnupriya Ilango October 15, 2021
7 YOP Poll <= 6.3.0 - Author+ Stored Cross-Site Scripting via Options Module CVE-2021-24834 5.4 Vishnupriya Ilango October 15, 2021
8 YOP Poll <= 6.2.7 - Unauthenticated Stored Cross-Site Scripting CVE-2021-24454 6.1 Toby Jackson June 17, 2021
9 YOP Poll <= 6.1.4 - Authenticated Stored Cross-Site Scripting 6.4 Jeroen Mulder April 24, 2020
10 YOP Poll <= 6.1.1 - Reflected Cross-Site Scripting CVE-2021-24885 6.1 Mastur Fatullah January 15, 2020

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