Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2018-18494

22
FAUCET Score

CVE-2018-18494 describes a same-origin policy violation in Mozilla Firefox, Firefox ESR, and Thunderbird versions prior to 64, 60.4, and 60.4 respectively. This vulnerability allows an attacker to steal cross-origin URL entries by manipulating the Javascript location property to trigger a redirection, which can then be captured using performance.getEntries(). Rated with a CVSS score of 6.5 (Medium), it requires user interaction (UI:R) and has a high impact on confidentiality (C:H), but no impact on integrity or availability. There is no public exploit code available, it is not listed in CISA's KEV catalog, and there is no significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 60.4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 64.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 60.4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.55%
Probability of exploitation in next 30 days
EPSS Percentile
72.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0155 is in the 85th percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:60.4.0-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:60.4.0-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:60.4.0-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:60.4.0-1.el7_6
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-18494Important

Mozilla: Same-origin policy violation using location attribute and performance.getEntries to steal cross-origin URLs

Dec 11, 2018

References

access.redhat.com / errata/RHSA-2018:3831
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3833
Third Party Advisory
access.redhat.com / errata/RHSA-2019:0159
Third Party Advisory
access.redhat.com / errata/RHSA-2019:0160
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue TrackingPermissions RequiredVendor Advisory
lists.debian.org / debian-lts-announce/2018/12/msg00002.html
Third Party Advisory
security.gentoo.org / glsa/201903-04
Third Party Advisory
usn.ubuntu.com / 3844-1
Third Party Advisory
usn.ubuntu.com / 3868-1
Third Party Advisory
debian.org / security/2018/dsa-4354
Third Party Advisory
debian.org / security/2019/dsa-4362
Third Party Advisory
mozilla.org / security/advisories/mfsa2018-29
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-30
Vendor Advisory
mozilla.org / security/advisories/mfsa2018-31
Vendor Advisory
securityfocus.com / bid/106168
Third Party AdvisoryVDB Entry