What’s Vulnerable › Vulnerabilities

CVE-2008-5555

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 12.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2008-12-12 · updated 2026-06-16
• Weakness: CWE-79

Description

Microsoft Internet Explorer 8.0 Beta 2 relies on the XDomainRequestAllowed HTTP header to authorize data exchange between domains, which allows remote attackers to bypass the product's XSS Filter protection mechanism, and conduct XSS and cross-domain attacks, by injecting this header after a CRLF sequence, related to "XDomainRequest Allowed Injection (XAI)." NOTE: the vendor has reportedly stated that the XSS Filter intentionally does not attempt to "address every conceivable XSS attack scenario."

Affected products

• Microsoft Internet Explorer 11: 8-beta2

References

• http://www.securityfocus.com/archive/1/499124/100/0/threaded
• https://exchange.xforce.ibmcloud.com/vulnerabilities/47277
• https://exchange.xforce.ibmcloud.com/vulnerabilities/47444
• http://www.securityfocus.com/archive/1/499124/100/0/threaded
• https://exchange.xforce.ibmcloud.com/vulnerabilities/47277
• https://exchange.xforce.ibmcloud.com/vulnerabilities/47444

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