Opera: >> Opera Browser >> 10.54 Security Vulnerabilities
Opera before 11.51 allows remote attackers to cause an insecure site to appear secure or trusted via unspecified actions related to Extended Validation and loading content from trusted sources in an unspecified sequence that causes the address field and page information dialog to contain security information based on the trusted site, instead of the insecure site.
CVSS Score
4.3
EPSS Score
0.01
Published
2011-09-06
Opera cannot properly restrict modifications to cookies established in HTTPS sessions, which allows man-in-the-middle attackers to overwrite or delete arbitrary cookies via a Set-Cookie header in an HTTP response, related to lack of the HTTP Strict Transport Security (HSTS) includeSubDomains feature, aka a "cookie forcing" issue.
CVSS Score
5.8
EPSS Score
0.004
Published
2011-08-09
Unspecified vulnerability in Opera before 11.11 allows remote attackers to cause a denial of service (application crash) via unknown content on a web page, as demonstrated by www.falk.de.
CVSS Score
5.0
EPSS Score
0.005
Published
2011-07-01
Opera before 11.11 allows user-assisted remote attackers to cause a denial of service (application crash) via a crafted web page that is not properly handled during a reload occurring after the opening of a popup of the Easy Sticky Note extension.
CVSS Score
4.3
EPSS Score
0.005
Published
2011-07-01
The Cascading Style Sheets (CSS) implementation in Opera before 11.11 does not properly handle the column-count property, which allows remote attackers to cause a denial of service (infinite repaint loop and application hang) via a web page, as demonstrated by an unspecified Wikipedia page.
CVSS Score
5.0
EPSS Score
0.005
Published
2011-07-01
Opera before 11.11 does not properly handle destruction of a Silverlight instance, which allows remote attackers to cause a denial of service (application crash) via a web page, as demonstrated by vod.onet.pl.
CVSS Score
5.0
EPSS Score
0.005
Published
2011-07-01
Unspecified vulnerability in Opera before 11.11 allows remote attackers to cause a denial of service (application crash) via vectors involving a Certificate Revocation List (CRL) file, as demonstrated by the multicert-ca-02.crl file.
CVSS Score
5.0
EPSS Score
0.003
Published
2011-07-01
Opera before 11.10 allows remote attackers to hijack (1) searches and (2) customizations via unspecified third party applications.
CVSS Score
5.0
EPSS Score
0.003
Published
2011-07-01
The Cascading Style Sheets (CSS) implementation in Opera before 11.10 allows remote attackers to cause a denial of service (application crash) via vectors involving use of the :hover pseudo-class, in conjunction with transforms, for a floated element.
CVSS Score
5.0
EPSS Score
0.005
Published
2011-07-01
Unspecified vulnerability in Opera before 11.10 allows remote attackers to cause a denial of service (application crash) via unknown content on a web page, as demonstrated by a certain Tomato Firmware page.
CVSS Score
5.0
EPSS Score
0.005
Published
2011-07-01