Is CVE-2018-5158 in the CISA KEV catalog?

No. CVE-2018-5158 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-5158?

CVE-2018-5158 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2018-5158?

CVE-2018-5158 has an EPSS score of 10.58% (95th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2018-5158

HIGHEPSS 95th pctl

8.8

CVSS v3

NVD

Description

The PDF viewer does not sufficiently sanitize PostScript calculator functions, allowing malicious JavaScript to be injected through a crafted PDF file. This JavaScript can then be run with the permissions of the PDF viewer by its worker. This vulnerability affects Firefox ESR < 52.8 and Firefox < 60.

CWE-94Code Injection

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

10.58%probability of exploitation in 30 days

95thpercentile

Very high risk: more likely to be exploited than 95% of all known CVEs.

References

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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.