What’s Vulnerable › Vulnerabilities

CVE-2018-5114

• Severity: medium (CVSS 5.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-06-11 · updated 2026-06-17
• Weakness: CWE-200

Description

If an existing cookie is changed to be "HttpOnly" while a document is open, the original value remains accessible through script until that document is closed. Network requests correctly use the changed HttpOnly cookie. This vulnerability affects Firefox < 58.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10
• Mozilla Firefox: through 57.0.4

References

• http://www.securityfocus.com/bid/102786
• http://www.securitytracker.com/id/1040270
• https://bugzilla.mozilla.org/show_bug.cgi?id=1421324
• https://usn.ubuntu.com/3544-1/
• https://www.mozilla.org/security/advisories/mfsa2018-02/
• http://www.securityfocus.com/bid/102786
• http://www.securitytracker.com/id/1040270
• https://bugzilla.mozilla.org/show_bug.cgi?id=1421324
• https://usn.ubuntu.com/3544-1/
• https://www.mozilla.org/security/advisories/mfsa2018-02/

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