Is CVE-2018-12381 in the CISA KEV catalog?

No. CVE-2018-12381 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-12381?

CVE-2018-12381 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2018-12381?

CVE-2018-12381 has an EPSS score of 1.84% (76th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-12381?

Upgrade DeveloperEdition to 62.0 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-12381

MEDIUMEPSS 76th pctl

5.3

CVSS v3

NVD

Description

Manually dragging and dropping an Outlook email message into the browser will trigger a page navigation when the message's mail columns are incorrectly interpreted as a URL. *Note: this issue only affects Windows operating systems with Outlook installed. Other operating systems are not affected.*. This vulnerability affects Firefox ESR < 60.2 and Firefox < 62.

CWE-610

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:62.0Fixed in:62.0Mozilla

Affected:60.2.0Fixed in:60.2.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:60.2.0Fixed in:60.2.0Mozilla

Affected:62.0Fixed in:62.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

1.84%probability of exploitation in 30 days

76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Patch1

bugzilla.mozilla.org

Vendor Advisory2

Third-Party Advisory3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-25.