How severe is CVE-2018-20323?

CVE-2018-20323 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-20323 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 54% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20323?

CVE-2018-20323 affects Mailcleaner. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20323?

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-2018-20323 published?

CVE-2018-20323 was published on 2019-03-21 and last updated on 2026-06-17.

CVE-2018-20323

CVE-2018-20323 is a high-severity vulnerability in Mailcleaner with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 54% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 54% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Mailcleaner
Published: 2019-03-21
Last modified: 2026-06-17

Description

www/soap/application/MCSoap/Logs.php in MailCleaner Community Edition 2018.08 allows remote attackers to execute arbitrary OS commands.

Frequently asked questions

What is CVE-2018-20323?: www/soap/application/MCSoap/Logs.php in MailCleaner Community Edition 2018.08 allows remote attackers to execute arbitrary OS commands.
How severe is CVE-2018-20323?: CVE-2018-20323 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-20323 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 54% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20323?: CVE-2018-20323 affects Mailcleaner. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20323?: 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-2018-20323 published?: CVE-2018-20323 was published on 2019-03-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mailcleaner:mailcleaner:2018.08:*:*:*:community:*:*:*

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