How severe is CVE-2023-28731?

CVE-2023-28731 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-2023-28731 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28731?

CVE-2023-28731 affects Acymailing. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-28731?

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.

When was CVE-2023-28731 published?

CVE-2023-28731 was published on 2023-03-30 and last updated on 2026-06-17.

CVE-2023-28731

CVE-2023-28731 is a critical-severity vulnerability in Acymailing with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Acymailing
Published: 2023-03-30
Last modified: 2026-06-17

Description

AnyMailing Joomla Plugin is vulnerable to unauthenticated remote code execution, when being granted access to the campaign's creation on front-office due to unrestricted file upload allowing PHP code to be injected. This issue affects AnyMailing Joomla Plugin Enterprise in versions below 8.3.0.

Frequently asked questions

What is CVE-2023-28731?: AnyMailing Joomla Plugin is vulnerable to unauthenticated remote code execution, when being granted access to the campaign's creation on front-office due to unrestricted file upload allowing PHP code to be injected. This issue affects AnyMailing Joomla Plugin Enterprise in versions below 8.3.0.
How severe is CVE-2023-28731?: CVE-2023-28731 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-2023-28731 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28731?: CVE-2023-28731 affects Acymailing. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-28731?: 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.
When was CVE-2023-28731 published?: CVE-2023-28731 was published on 2023-03-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:acymailing:acymailing:*:*:*:*:*:joomla\!:*:*

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