How severe is CVE-2018-18635?

CVE-2018-18635 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-18635 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18635?

CVE-2018-18635 primarily affects Mailcleaner. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-18635?

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

When was CVE-2018-18635 published?

CVE-2018-18635 was published on 2018-10-24 and last updated on 2026-06-17.

CVE-2018-18635

CVE-2018-18635 is a medium-severity vulnerability in Mailcleaner with a CVSS 3.x base score of 6.1. 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: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mailcleaner
Published: 2018-10-24
Last modified: 2026-06-17

Description

www/guis/admin/application/controllers/UserController.php in the administration login interface in MailCleaner CE 2018.08 and 2018.09 allows XSS via the admin/login/user/message/ PATH_INFO.

Frequently asked questions

What is CVE-2018-18635?: www/guis/admin/application/controllers/UserController.php in the administration login interface in MailCleaner CE 2018.08 and 2018.09 allows XSS via the admin/login/user/message/ PATH_INFO.
How severe is CVE-2018-18635?: CVE-2018-18635 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-18635 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18635?: CVE-2018-18635 primarily affects Mailcleaner. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-18635?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-18635 published?: CVE-2018-18635 was published on 2018-10-24 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:mailcleaner:mailcleaner:2018.08:*:*:*:community:*:*:*
cpe:2.3:a:mailcleaner:mailcleaner:2018.09:*:*:*:community:*:*:*

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