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CVE-2021-24124: 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

medium Affects wp-shieldon (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

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

Package
wp-shieldon (WordPress plugin) WordPress
Affected versions
<=1.6.3
Fixed in
no fix recorded
Severity
medium  CVSS 6.1
Exploitation
not on CISA KEV · EPSS 1% (66.7th percentile)
Published
2021-03-18
Source
nvd

References

CWE-79
NVD recordwp-shieldon (WordPress plugin) advisories

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