How severe is CVE-2018-16637?

CVE-2018-16637 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-16637 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16637?

CVE-2018-16637 affects Modx Evolution Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-16637?

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

When was CVE-2018-16637 published?

CVE-2018-16637 was published on 2018-12-28 and last updated on 2026-06-17.

CVE-2018-16637

CVE-2018-16637 is a medium-severity vulnerability in Modx Evolution Cms with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Modx Evolution Cms
Published: 2018-12-28
Last modified: 2026-06-17

Description

Evolution CMS 1.4.x allows XSS via the page weblink title parameter to the manager/ URI.

Frequently asked questions

What is CVE-2018-16637?: Evolution CMS 1.4.x allows XSS via the page weblink title parameter to the manager/ URI.
How severe is CVE-2018-16637?: CVE-2018-16637 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-16637 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16637?: CVE-2018-16637 affects Modx Evolution Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-16637?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-16637 published?: CVE-2018-16637 was published on 2018-12-28 and last updated on 2026-06-17.

References

https://github.com/security-breachlock/CVE-2018-16637/blob/master/evolution_xss_stored.pdf

Affected products (1)

cpe:2.3:a:modx:evolution_cms:*:*:*:*:*:*:*:*

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