CVE-2018-18505

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
10.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 5%CVSS: 10.0Exploit: NoneExposed: 0

A fix is available — apply it.

An earlier fix for an Inter-process Communication (IPC) vulnerability, CVE-2011-3079, added authentication to communication between IPC endpoints and server parents during IPC process creation. This authentication is insufficient for channels created after the IPC process is started, leading to the authentication not being correctly applied to later channels. This could allow for a sandbox escape through IPC channels due to lack of message validation in the listener process. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity100% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
90.6%
KEV
Not listed

Published

February 5, 2019

Last Modified

November 25, 2025

Advisory Details (9)

Auto-updated Jul 18, 2026
Patch available. Sources: redhat.
generic

Mozilla Firefox: Multiple vulnerabilities (GLSA 201903-04) — Gentoo security

https://security.gentoo.org/glsa/201903-04
generic Patch Available

[SECURITY] [DLA 1678-1] thunderbird security update

https://lists.debian.org/debian-lts-announce/2019/02/msg00024.html
generic Patch Available

[SECURITY] [DLA 1648-1] firefox-esr security update

https://lists.debian.org/debian-lts-announce/2019/01/msg00025.html
generic

1087565 - (CVE-2011-3079) IPC Channel does not validate the listener.

https://bugzilla.mozilla.org/show_bug.cgi?id=1087565
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2019:0270
redhat Patch Available

Affected: Red Hat Enterprise Linux 6.

https://access.redhat.com/errata/RHSA-2019:0269
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2019:0219
redhat Patch Available

Affected: Red Hat Enterprise Linux 6.

https://access.redhat.com/errata/RHSA-2019:0218
generic
http://www.securityfocus.com/bid/106781

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuxul-ext-lightning (1:60.5.1+build2-0ubuntu0.18.04.1) @ bionic2026-05-27ubuntu
ubuntufirefox-testsuite (65.0+build2-0ubuntu0.18.04.1) @ bionic2026-05-27ubuntu
redhatthunderbird-0:60.5.0-1.el7_62019-02-04redhat
redhatthunderbird-0:60.5.0-1.el6_102019-02-04redhat
redhatfirefox-0:60.5.0-2.el72019-01-30redhat
redhatfirefox-0:60.5.0-2.el62019-01-30redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(6)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 11× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 103 total refreshes for this CVE.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 01:34 UTCEG score recompute
  3. 2026-07-22 22:14 UTCEG score recompute
  4. 2026-07-22 14:05 UTCEPSS rescore
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  6. 2026-07-20 23:02 UTCOSV refresh
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  8. 2026-07-03 18:26 UTCOSV refresh
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  40. 2026-06-15 06:43 UTCOSV refresh
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  71. 2026-05-27 22:43 UTCVendor advisory
  72. 2026-05-27 22:43 UTCGHSA enrichment
  73. 2026-05-27 13:38 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2018-18505?
CVE-2018-18505 is a critical vulnerability published on February 5, 2019. An earlier fix for an Inter-process Communication (IPC) vulnerability, CVE-2011-3079, added authentication to communication between IPC endpoints and server parents during IPC process creation. This authentication is insufficient for channels created after the IPC process is started, leading to the…
When was CVE-2018-18505 disclosed?
CVE-2018-18505 was first published in the National Vulnerability Database on February 5, 2019, with the most recent update on November 25, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-18505 actively exploited?
CVE-2018-18505 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-18505?
CVE-2018-18505 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2018-18505?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-18505, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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