Vulnerability Report

CVE-2011-2631

Title: Opera Opera Browser Denial of Service (DoS)

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2011-2631.

CWE Category CWE-20

Published Date Jul 01, 2011

Modified Date Apr 29, 2026

Exploit Status Not Found

Score 5.0 CVSS v2.0

Exploit Probability (EPSS)

0.49%

Vulnerability Summary

CVE-2011-2631: 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.

Impacted Vendors

opera 1

Reference Links

http://www.opera.com/docs/changelogs/mac/1111/ http://www.opera.com/docs/changelogs/unix/1111/ http://www.opera.com/docs/changelogs/windows/1111/ http://www.opera.com/docs/changelogs/mac/1111/ http://www.opera.com/docs/changelogs/unix/1111/ http://www.opera.com/docs/changelogs/windows/1111/

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

5.0

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2011-2631 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

April 29, 2026 MODIFIED

Vulnerability data updated via NVD.

April 11, 2025 MODIFIED

Vulnerability data or affected products updated.

July 01, 2011 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


                                    AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected Stack

No specific products linked.