{"cve":"CVE-2008-5553","nvd":{"published":"2008-12-12T18:30:03.313","modified":"2026-06-16T23:00:32.493","status":"Modified","description":"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.\"","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-79"],"references":["http://www.securityfocus.com/archive/1/499124/100/0/threaded","https://exchange.xforce.ibmcloud.com/vulnerabilities/47277","https://exchange.xforce.ibmcloud.com/vulnerabilities/47442","http://www.securityfocus.com/archive/1/499124/100/0/threaded","https://exchange.xforce.ibmcloud.com/vulnerabilities/47277"],"products":["microsoft:internet_explorer"],"source":"nvd","synced_at":"2026-10-19T19:53:23.791937413+00:00"},"epss":{"cve":"CVE-2008-5553","score":0.11565,"percentile":0.96033,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}