How severe is CVE-2021-24124?

CVE-2021-24124 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-24124 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24124?

CVE-2021-24124 affects Terryl Wp Shieldon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24124?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-24124 published?

CVE-2021-24124 was published on 2021-03-18 and last updated on 2026-06-17.

CVE-2021-24124

CVE-2021-24124 is a medium-severity vulnerability in Terryl Wp Shieldon with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Terryl Wp Shieldon
Published: 2021-03-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 could lead to privileged escalation.
How severe is CVE-2021-24124?: CVE-2021-24124 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-24124 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24124?: CVE-2021-24124 affects Terryl Wp Shieldon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24124?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24124 published?: CVE-2021-24124 was published on 2021-03-18 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:terryl:wp_shieldon:*:*:*:*:*:wordpress:*:*

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