How severe is CVE-2021-24509?

CVE-2021-24509 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-2021-24509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24509?

CVE-2021-24509 affects A3rev Page View Count. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24509?

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

When was CVE-2021-24509 published?

CVE-2021-24509 was published on 2021-08-09 and last updated on 2026-06-17.

CVE-2021-24509

CVE-2021-24509 is a medium-severity vulnerability in A3rev Page View Count 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% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: A3rev Page View Count
Published: 2021-08-09
Last modified: 2026-06-17

Description

The Page View Count WordPress plugin before 2.4.9 does not escape the postid parameter of pvc_stats shortcode, allowing users with a role as low as Contributor to perform Stored XSS attacks. A post made by a contributor would still have to be approved by an admin to have the XSS triggered in the frontend, however, higher privilege users, such as editor could exploit this without the need of approval, and even when the blog disallows the unfiltered_html capability.

Frequently asked questions

What is CVE-2021-24509?: The Page View Count WordPress plugin before 2.4.9 does not escape the postid parameter of pvc_stats shortcode, allowing users with a role as low as Contributor to perform Stored XSS attacks. A post made by a contributor would still have to be approved by an admin to have the XSS triggered in the frontend, however, higher privilege users, such as editor could exploit this without the need of approval, and even when the blog disallows the unfiltered_html capability.
How severe is CVE-2021-24509?: CVE-2021-24509 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-2021-24509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24509?: CVE-2021-24509 affects A3rev Page View Count. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24509?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24509 published?: CVE-2021-24509 was published on 2021-08-09 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/06df2729-21da-4c22-ae1e-dda1f15bdf8f

Affected products (1)

cpe:2.3:a:a3rev:page_view_count:*:*:*:*:*:wordpress:*:*

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