CVE-2008-5553: n/a vulnerability

CVE-2008-5553: The XSS Filter in Microsoft Internet Explorer 8.0 Beta 2 disables itself upon encountering a certain X-XSS-...

The XSS Filter in Microsoft Internet Explorer 8.0 Beta 2 disables itself upon encountering a certain X-XSS-Protection HTTP header, which allows remote attackers to bypass the XSS protection mechanism and conduct XSS attacks by injecting this header after a CRLF sequence. NOTE: the vendor has reportedly stated that the XSS Filter intentionally does not attempt to "address every conceivable XSS attack scenario."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 10:56 UTC (UTC+00:00)

Security readout for executives and security teams

This issue concerns a beta version of Internet Explorer 8, where its built-in XSS filter could be disabled by a crafted HTTP header condition. The main business risk is legacy browser exposure, not modern platform exposure. The source bundle does not provide a CVSS score, confirmed patch, or evidence of active exploitation. Likely exposure is limited to environments where users still operate Internet Explorer 8.0 Beta 2 or equivalent legacy test images. The bundle lists affected vendor and product as n/a, so precise product scope is incomplete. Low urgency for modern environments, but validate legacy browser exposure. If obsolete IE beta builds remain in production, prioritize removal because the control being bypassed is unreliable and unsupported. Mitigation focus: Identify and retire Internet Explorer 8.0 Beta 2 usage.; Use supported browsers with current security maintenance.; Check Microsoft or vendor guidance for historical fixes..

Prepared: Jun 28, 2026, 11:41 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: Dec 12, 2008, 18:13 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
ie-antixss-xss(47277)CVE reference · vdb-entry, x_refsource_XF
ie-xxssprotection-xss-filter-bypass(47442)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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