CVE-2017-5458: Mozilla Firefox vulnerability

CVE-2017-5458: When a "javascript:" URL is drag and dropped by a user into the addressbar, the URL will be processed and e...

When a "javascript:" URL is drag and dropped by a user into the addressbar, the URL will be processed and executed. This allows for users to be socially engineered to execute an XSS attack on themselves. This vulnerability affects Firefox < 53.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 15:04 UTC (UTC+00:00)

Security readout for executives and security teams

This issue affected Firefox before version 53. A user could be tricked into dragging a javascript: URL into the address bar, causing script execution in the browser. The business risk is mainly social-engineering-driven self-XSS on outdated Firefox installations, not a remotely exploitable server flaw. Exposure is limited to endpoints still running Firefox before version 53. Modern managed browser fleets should have low exposure unless legacy systems, frozen images, portable installs, or unmanaged endpoints remain. Treat this as a legacy endpoint hygiene issue. Prioritize remediation where old Firefox versions exist on user workstations, shared terminals, or sensitive environments exposed to phishing and social engineering. Mitigation focus: Upgrade affected Firefox installations to version 53 or later.; Remove unsupported Firefox builds from managed endpoints.; Check vendor guidance and Mozilla advisories for any related hardening notes..

Prepared: Jun 7, 2026, 06:44 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 11, 2018, 21:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.mozilla.org/show_bug.cgi?id=1229426CVE reference · x_refsource_CONFIRM
https://www.mozilla.org/security/advisories/mfsa2017-10/CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

MozillaFirefoxunspecifiedListed

Weakness

CWE details

No CWE listed

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