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Unrated severityNVD Advisory· Published Jul 21, 2011· Updated Apr 29, 2026

CVE-2011-0242

CVE-2011-0242

Description

Cross-site scripting (XSS) vulnerability in WebKit in Apple Safari before 5.0.6 allows remote attackers to inject arbitrary web script or HTML via vectors involving a URL that contains a username.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Safari before 5.0.6 allows XSS via a URL that contains a username, due to WebKit not properly escaping the username component.

Vulnerability

An XSS vulnerability exists in WebKit as used in Apple Safari before 5.0.6 [2]. The flaw occurs when a URL contains a username component that includes injected script or HTML; the browser parses the URL and renders the malicious content without proper escaping. This can be triggered without special configurations—any page that constructs links from user-supplied data or directly visits a crafted URL can lead to script execution.

Exploitation

An attacker must craft a URL with a malicious username (e.g., http://@host/). If a user clicks such a link, Safari's WebKit processes the URL and executes the injected script in the context of the current page. No authentication or special privileges are required; the attack relies solely on user interaction to follow the link.

Impact

Successful exploitation allows arbitrary web script or HTML injection into the browser, leading to data theft, session hijacking, or redirection to malicious sites. The attacker achieves the same privileges as the victim's session on the target domain.

Mitigation

Apple addressed this issue in Safari 5.0.6 (and Safari 5.1 on OS X Lion) as documented in reference [2]. Users should upgrade to the latest version. The Apple security advisory does not list a CVE-specific workaround, but general XSS prevention—like disabling JavaScript or using browser extensions—can reduce risk. No evidence indicates this CVE is on the KEV list.

References
  1. About the security content of Safari 5.1 and Safari 5.0.6 - Apple Support

AI Insight generated on May 23, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.

Affected products

68
  • Apple Inc./Safari67 versions
    cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*+ 66 more
    • cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*range: <=5.0.5
    • cpe:2.3:a:apple:safari:1.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.0.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.0.0b1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.0.0b2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.0.3:85.8:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.0.3:85.8.1:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.0:beta:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.0:beta2:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.1.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.1.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.2.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.2.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.2.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.2.3:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.2.4:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.2.5:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.3:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.3.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.3.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.3.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.3.2:312.5:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:1.3.2:312.6:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2.0.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2.0.3:417.8:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2.0.3:417.9:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2.0.3:417.9.2:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2.0.3:417.9.3:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:2.0.4:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0.0b:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0.1b:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0.2b:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0.3b:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0.4:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.0.4b:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.1.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.1.0b:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.1.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.1.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.2.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.2.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:3.2.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:4.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:4.1.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:4.1.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:5.0:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:5.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:5.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:5.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:apple:safari:5.0.4:*:*:*:*:*:*:*
    • (no CPE)range: <5.0.6
  • Apple Inc./Webkit
    cpe:2.3:a:apple:webkit:*:*:*:*:*:*:*:*

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

4

News mentions

0

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