Opera 7.54 and earlier does not properly validate base64 encoded binary data in a data: (RFC 2397) URL, which causes the URL to be obscured in a download dialog, which may allow remote attackers to trick users into executing arbitrary code.
https://exchange.xforce.ibmcloud.com/vulnerabilities/18867
http://www.kb.cert.org/vuls/id/882926
http://www.gentoo.org/security/en/glsa/glsa-200502-17.xml
Source: Mitre, NVD
Published: 2005-01-12
Updated: 2025-04-03
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 9.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity: Critical
EPSS: 0.06168