How severe is CVE-2023-6875?

CVE-2023-6875 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-6875 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 90% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-6875?

CVE-2023-6875 affects Wpexperts Post Smtp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-6875?

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

Does CVE-2023-6875 have an EU (EUVD) identifier?

Yes. CVE-2023-6875 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-59079.

When was CVE-2023-6875 published?

CVE-2023-6875 was published on 2024-01-11 and last updated on 2026-06-17.

CVE-2023-6875

CVE-2023-6875 is a critical-severity vulnerability in Wpexperts Post Smtp with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 90% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-639.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 90% (100th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-59079
Weakness: CWE-639
Affected product: Wpexperts Post Smtp
Published: 2024-01-11
Last modified: 2026-06-17

Description

The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to unauthorized access of data and modification of data due to a type juggling issue on the connect-app REST endpoint in all versions up to, and including, 2.8.7. This makes it possible for unauthenticated attackers to reset the API key used to authenticate to the mailer and view logs, including password reset emails, allowing site takeover. CVE-2023-52233 appears to be a duplicate of this issue.

Frequently asked questions

What is CVE-2023-6875?: The POST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress plugin for WordPress is vulnerable to unauthorized access of data and modification of data due to a type juggling issue on the connect-app REST endpoint in all versions up to, and including, 2.8.7. This makes it possible for unauthenticated attackers to reset the API key used to authenticate to the mailer and view logs, including password reset emails, allowing site takeover. CVE-2023-52233 appears to be a duplicate of this issue.
How severe is CVE-2023-6875?: CVE-2023-6875 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-6875 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 90% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-6875?: CVE-2023-6875 affects Wpexperts Post Smtp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-6875?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2023-6875 have an EU (EUVD) identifier?: Yes. CVE-2023-6875 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-59079.
When was CVE-2023-6875 published?: CVE-2023-6875 was published on 2024-01-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wpexperts:post_smtp:*:*:*:*:*:wordpress:*:*

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