How severe is CVE-2024-4045?

CVE-2024-4045 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2024-4045 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-4045?

CVE-2024-4045 affects Optinmonster. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-4045?

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

Does CVE-2024-4045 have an EU (EUVD) identifier?

Yes. CVE-2024-4045 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32610.

When was CVE-2024-4045 published?

CVE-2024-4045 was published on 2024-05-25 and last updated on 2026-06-17.

CVE-2024-4045

CVE-2024-4045 is a medium-severity vulnerability in Optinmonster with a CVSS 3.x base score of 6.4. 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 6.4)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-32610
Weakness: CWE-79
Affected product: Optinmonster
Published: 2024-05-25
Last modified: 2026-06-17

Description

The Popup Builder by OptinMonster – WordPress Popups for Optins, Email Newsletters and Lead Generation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘campaign_id’ parameter in versions up to, and including, 2.16.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Frequently asked questions

What is CVE-2024-4045?: The Popup Builder by OptinMonster – WordPress Popups for Optins, Email Newsletters and Lead Generation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘campaign_id’ parameter in versions up to, and including, 2.16.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
How severe is CVE-2024-4045?: CVE-2024-4045 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2024-4045 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-4045?: CVE-2024-4045 affects Optinmonster. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-4045?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-4045 have an EU (EUVD) identifier?: Yes. CVE-2024-4045 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32610.
When was CVE-2024-4045 published?: CVE-2024-4045 was published on 2024-05-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:optinmonster:optinmonster:*:*:*:*:*:wordpress:*:*

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