CVE-2011-2635

CVE-2011-2635 is a medium-severity vulnerability in Opera Opera Browser with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Description

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.

Frequently asked questions

What is CVE-2011-2635?
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.
How severe is CVE-2011-2635?
CVE-2011-2635 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-2635 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2635?
CVE-2011-2635 primarily affects Opera Opera Browser. In total, 117 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2635?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-2635 published?
CVE-2011-2635 was published on 2011-07-01 and last updated on 2026-06-16.

References

Affected products (117)

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