CVE-2018-18499: mozilla firefox Origin Validation Error
Vulnerability summary
CVE-2018-18499 is a medium (CVSS 6.5) Origin Validation Error vulnerability in mozilla firefox. EPSS estimates a 1.09% chance of exploitation in the next 30 days, higher than 65.4% of scored vulnerabilities.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8Timeline
- 28-02-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A same-origin policy violation allowing the theft of cross-origin URL entries when using a meta http-equiv="refresh" on a page to cause a redirection to another site using performance.getEntries(). This is a same-origin policy violation and could allow for data theft. This vulnerability affects Firefox < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS trend
Probability
1.09%
Chance of exploitation in the next 30 days
Percentile
65%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.09% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu4 products
- firefox< 62.0+build2-0ubuntu0.16.04.3
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- thunderbird< 1:60.2.1+build1-0ubuntu0.14.04.2 | < 1:60.2.1+build1-0ubuntu0.16.04.4 | < 1:60.2.1+build1-0ubuntu0.18.04.2
Mozilla3 products
- firefox≥ unspecified, < 62 | < 62.0
- firefox esr≥ unspecified, < 60.2 | < 60.2
- thunderbird≥ unspecified, < 60.2.1 | < 60.2.1
Debian2 products
- firefox-esr< 60.2.0esr-1
- thunderbird< 1:60.2.1-1
3 vendors · 9 products
References
10 links- bugzilla.mozilla.org/show_bug.cgi?id=1468523X Refsource CONFIRMIssue TrackingPermissions RequiredVendor AdvisoryREPORT
