CVE-2018-5158
The PDF viewer does not sufficiently sanitize PostScript calculator functions, allowing malicious JavaScript to be injected through a crafted PDF file.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 10.2%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 10.24% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-94
- Affected
- debian/debian linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux server tus · redhat/enterprise linux workstation · mozilla/firefox · canonical/ubuntu linux
- Source
- security@mozilla.org
EPSS moved from 12.3% on 21 September 2026 to 10.2% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://www.securityfocus.com/bid/104136Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040896Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1414Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1415Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1452075Issue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/05/msg00007.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://usn.ubuntu.com/3645-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4199Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-11/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-12/Vendor Advisory
- http://www.securityfocus.com/bid/104136Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040896Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1414Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1415Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1452075Issue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/05/msg00007.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://usn.ubuntu.com/3645-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4199Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-11/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-12/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.