What’s Vulnerable › Vulnerabilities

CVE-2021-24124: WP Shieldon 1.6.3 - Unauthenticated Cross-Site Scripting (XSS)

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-18 · updated 2026-06-17
• Weakness: CWE-79

Description

Unvalidated input and lack of output encoding in the WP Shieldon WordPress plugin, version 1.6.3 and below, leads to Unauthenticated Reflected Cross-Site Scripting (XSS) when the CAPTCHA page is shown could lead to privileged escalation.

Affected products

• WP Shieldon: through 1.6.3

References

• https://wpscan.com/vulnerability/8d0eb0b4-0cc0-44e5-b720-90b01df3a6ee
• https://wpscan.com/vulnerability/8d0eb0b4-0cc0-44e5-b720-90b01df3a6ee

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