How severe is CVE-2021-24826?

CVE-2021-24826 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-24826 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24826?

CVE-2021-24826 affects Custom Content Shortcode Project Custom Content Shortcode. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24826?

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

When was CVE-2021-24826 published?

CVE-2021-24826 was published on 2022-03-07 and last updated on 2026-06-17.

CVE-2021-24826

CVE-2021-24826 is a medium-severity vulnerability in Custom Content Shortcode Project Custom Content Shortcode with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Custom Content Shortcode Project Custom Content Shortcode
Published: 2022-03-07
Last modified: 2026-06-17

Description

The Custom Content Shortcode WordPress plugin before 4.0.2 does not escape custom fields before outputting them, which could allow Contributor+ (v < 4.0.1) or Admin+ (v < 4.0.2) users to perform Cross-Site Scripting attacks even when the unfiltered_html is disallowed. Please note that such attack is still possible by admin+ in single site blogs by default (but won't be when the unfiltered_html is disallowed)

Frequently asked questions

What is CVE-2021-24826?: The Custom Content Shortcode WordPress plugin before 4.0.2 does not escape custom fields before outputting them, which could allow Contributor+ (v < 4.0.1) or Admin+ (v < 4.0.2) users to perform Cross-Site Scripting attacks even when the unfiltered_html is disallowed. Please note that such attack is still possible by admin+ in single site blogs by default (but won't be when the unfiltered_html is disallowed)
How severe is CVE-2021-24826?: CVE-2021-24826 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-24826 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24826?: CVE-2021-24826 affects Custom Content Shortcode Project Custom Content Shortcode. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24826?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24826 published?: CVE-2021-24826 was published on 2022-03-07 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/e247d78a-7243-486c-a017-7471a8dcb800

Affected products (1)

cpe:2.3:a:custom_content_shortcode_project:custom_content_shortcode:*:*:*:*:*:wordpress:*:*

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