How severe is CVE-2023-3407?

CVE-2023-3407 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2023-3407 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-3407?

CVE-2023-3407 affects Subscribe2 Project Subscribe2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-3407?

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

When was CVE-2023-3407 published?

CVE-2023-3407 was published on 2023-06-28 and last updated on 2026-06-17.

CVE-2023-3407

CVE-2023-3407 is a medium-severity vulnerability in Subscribe2 Project Subscribe2 with a CVSS 3.x base score of 4.3. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Subscribe2 Project Subscribe2
Published: 2023-06-28
Last modified: 2026-06-17

Description

The Subscribe2 plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 10.40. This is due to missing or incorrect nonce validation when sending test emails. This makes it possible for unauthenticated attackers to send test emails with custom content to users on sites running a vulnerable version of this plugin via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Frequently asked questions

What is CVE-2023-3407?: The Subscribe2 plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 10.40. This is due to missing or incorrect nonce validation when sending test emails. This makes it possible for unauthenticated attackers to send test emails with custom content to users on sites running a vulnerable version of this plugin via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
How severe is CVE-2023-3407?: CVE-2023-3407 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2023-3407 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-3407?: CVE-2023-3407 affects Subscribe2 Project Subscribe2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-3407?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-3407 published?: CVE-2023-3407 was published on 2023-06-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:subscribe2_project:subscribe2:*:*:*:*:*:wordpress:*:*

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