CVE & CISA-KEV Catalog

CVE-2018-5117

MEDIUMEPSS 82th pctl
5.3
CVSS v3
NVD

Description

If right-to-left text is used in the addressbar with left-to-right alignment, it is possible in some circumstances to scroll this text to spoof the displayed URL. This issue could result in the wrong URL being displayed as a location, which can mislead users to believe they are on a different site than the one loaded. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.

How to fix

Remediation Available
firefoxDebian
Fixed in:58.0-1CVE-2018-5117
firefoxUbuntu
Fixed in:58.0+build6-0ubuntu0.14.04.1USN-3544-1
Fixed in:58.0+build6-0ubuntu0.16.04.1USN-3544-1
thunderbirdUbuntu
Fixed in:1:52.6.0+build1-0ubuntu0.14.04.1USN-3529-1
Fixed in:1:52.6.0+build1-0ubuntu0.16.04.1USN-3529-1
DeveloperEditionWindows application
Affected:52.6.0Fixed in:52.6.0Mozilla
Affected:58.0Fixed in:58.0Mozilla
Mozilla Firefox (en-US)Windows application
Affected:58.0Fixed in:58.0Mozilla
Affected:52.6.0Fixed in:52.6.0Mozilla
Mozilla Thunderbird (en-US)Windows application
Affected:52.6.0Fixed in:52.6.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityLow
AvailabilityNone

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

Exploit Intelligence

2.39%probability of exploitation in 30 days
82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

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HTML

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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.