CVE-2017-5453: Mozilla Firefox vulnerability

CVE-2017-5453: A mechanism to inject static HTML into the RSS reader preview page due to a failure to escape characters se...

A mechanism to inject static HTML into the RSS reader preview page due to a failure to escape characters sent as URL parameters for a feed's "TITLE" element. This vulnerability allows for spoofing but no scripted content can be run. 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

CVE-2017-5453 is a Firefox RSS preview spoofing issue. A crafted feed title could inject static HTML into the preview page because characters were not escaped correctly. Sources state that scripts could not run, so the impact is deception rather than code execution. It affects Firefox versions before 53. Exposure is mainly legacy endpoints still running Firefox before version 53, especially where users preview untrusted RSS feeds. Modern Firefox deployments should not be affected if they are consistently updated. Low priority for normally updated environments. Treat as hygiene debt on legacy desktops, with higher urgency only where unsupported Firefox remains in use with untrusted web or RSS content. Mitigation focus: Upgrade any Firefox installations older than version 53.; Check Mozilla MFSA2017-10 and Bugzilla for vendor guidance.; Remove unsupported legacy Firefox from managed endpoint baselines..

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=1321247CVE 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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