How severe is CVE-2023-4390?

CVE-2023-4390 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-4390 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4390?

CVE-2023-4390 affects Ays-pro Popup Box. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-4390?

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

When was CVE-2023-4390 published?

CVE-2023-4390 was published on 2023-10-31 and last updated on 2026-06-17.

CVE-2023-4390

CVE-2023-4390 is a medium-severity vulnerability in Ays-pro Popup Box with a CVSS 3.x base score of 4.8. 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 4.8)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ays-pro Popup Box
Published: 2023-10-31
Last modified: 2026-06-17

Description

The Popup box WordPress plugin before 3.7.2 does not sanitize and escape some Popup fields, which could allow high-privilege users such as an administrator to inject arbitrary web scripts even when the unfiltered_html capability is disallowed (for example in a multisite setup).

Frequently asked questions

What is CVE-2023-4390?: The Popup box WordPress plugin before 3.7.2 does not sanitize and escape some Popup fields, which could allow high-privilege users such as an administrator to inject arbitrary web scripts even when the unfiltered_html capability is disallowed (for example in a multisite setup).
How severe is CVE-2023-4390?: CVE-2023-4390 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-4390 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4390?: CVE-2023-4390 affects Ays-pro Popup Box. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-4390?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-4390 published?: CVE-2023-4390 was published on 2023-10-31 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/9fd2eb81-185d-4d42-8acf-925664b7cb2f

Affected products (1)

cpe:2.3:a:ays-pro:popup_box:*:*:*:*:*:wordpress:*:*

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