How severe is CVE-2023-3087?

CVE-2023-3087 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-3087 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-3087?

CVE-2023-3087 affects Wpmanageninja Fluentsmtp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-3087?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-3087 published?

CVE-2023-3087 was published on 2023-07-12 and last updated on 2026-06-17.

CVE-2023-3087

CVE-2023-3087 is a high-severity vulnerability in Wpmanageninja Fluentsmtp with a CVSS 3.x base score of 7.2. 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: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Wpmanageninja Fluentsmtp
Published: 2023-07-12
Last modified: 2026-06-17

Description

The FluentSMTP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via an email subject in versions up to, and including, 2.2.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Frequently asked questions

What is CVE-2023-3087?: The FluentSMTP plugin for WordPress is vulnerable to Stored Cross-Site Scripting via an email subject in versions up to, and including, 2.2.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
How severe is CVE-2023-3087?: CVE-2023-3087 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-3087 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-3087?: CVE-2023-3087 affects Wpmanageninja Fluentsmtp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-3087?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-3087 published?: CVE-2023-3087 was published on 2023-07-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wpmanageninja:fluentsmtp:*:*:*:*:*:wordpress:*:*

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