CVE-2013-1618: Opera Browser

Medium severity, CVSS 4.0. EPSS: 2.2% chance of exploitation in the next 30 days.

The TLS implementation in Opera before 12.13 does not properly consider timing side-channel attacks on a MAC check operation during the processing of malformed CBC padding, which allows remote attackers to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data for crafted packets, a related issue to CVE-2013-0169.

Affected products

• Opera Opera Browser: up to and including 12.12; version 12.00 only; version 12.01 only; version 12.02 only; version 12.10 only; version 12.11 only

Published 2013-02-08. Last modified 2026-06-16.