How severe is CVE-2021-24538?

CVE-2021-24538 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-2021-24538 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24538?

CVE-2021-24538 affects Current Book Project Current Book. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24538?

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

When was CVE-2021-24538 published?

CVE-2021-24538 was published on 2021-08-16 and last updated on 2026-06-17.

CVE-2021-24538

CVE-2021-24538 is a medium-severity vulnerability in Current Book Project Current Book 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% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Current Book Project Current Book
Published: 2021-08-16
Last modified: 2026-06-17

Description

The Current Book WordPress plugin through 1.0.1 does not sanitize user input when an authenticated user adds Author or Book Title, then does not escape these values when outputting to the browser leading to an Authenticated Stored XSS Cross-Site Scripting issue.

Frequently asked questions

What is CVE-2021-24538?: The Current Book WordPress plugin through 1.0.1 does not sanitize user input when an authenticated user adds Author or Book Title, then does not escape these values when outputting to the browser leading to an Authenticated Stored XSS Cross-Site Scripting issue.
How severe is CVE-2021-24538?: CVE-2021-24538 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-2021-24538 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24538?: CVE-2021-24538 affects Current Book Project Current Book. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24538?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24538 published?: CVE-2021-24538 was published on 2021-08-16 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/f9911a43-0f4c-403f-9fca-7822eb693317

Affected products (1)

cpe:2.3:a:current_book_project:current_book:*:*:*:*:*:wordpress:*:*

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