What’s Vulnerable › Vulnerabilities

CVE-2021-24834: YOP Poll < 6.3.1 - Author+ Stored Cross-Site Scripting via Options Module

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-17 · updated 2026-06-17
• Weakness: CWE-79

Description

The YOP Poll WordPress plugin before 6.3.1 is affected by a stored Cross-Site Scripting vulnerability which exists in the Create Poll - Options module where a user with a role as low as author is allowed to execute arbitrary script code within the context of the application. This vulnerability is due to insufficient validation of custom label parameters - vote button label , results link label and back to vote caption label.

Affected products

• YOP Poll: before 6.3.1 — fixed in 6.3.1

How to fix

Upgrade to a fixed version: YOP Poll 6.3.1. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/changeset/2605368
• https://wpscan.com/vulnerability/72f58b14-e5cb-4f1c-a16f-621238c6ebbf
• https://www.fortiguard.com/zeroday/FG-VD-21-053
• https://plugins.trac.wordpress.org/changeset/2605368
• https://wpscan.com/vulnerability/72f58b14-e5cb-4f1c-a16f-621238c6ebbf
• https://www.fortiguard.com/zeroday/FG-VD-21-053

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