CVE-2013-1639

Opera before 12.13 does not send CORS preflight requests in all required cases, which allows remote attackers to bypass a CSRF protection mechanism via a crafted web site that triggers a CORS request.

Published: 2013-02-08 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-1639 is rated Low Risk (36.4/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.11%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-1639

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-17 0.16% 0.11% -0.05%
2 2023-03-07 1.14% 0.16% -0.98%
3 2022-02-04 — 1.14% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-1639

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2013-1639

OS Trackers for CVE-2013-1639

vendor priority summary link
gentoo normal CVE-2013-1639: 1 GLSA(s) (201406-14), 1 atom(s) (www-client/opera); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-1639

Affected software / configurations for CVE-2013-1639

Vendor Product Version Raw CPE
opera opera_browser <= 12.12 cpe:2.3:a:opera:opera_browser:*:*:*:*:*:*:*:*
opera opera_browser 12.00 cpe:2.3:a:opera:opera_browser:12.00:*:*:*:*:*:*:*
opera opera_browser 12.00 cpe:2.3:a:opera:opera_browser:12.00:beta:*:*:*:*:*:*
opera opera_browser 12.01 cpe:2.3:a:opera:opera_browser:12.01:*:*:*:*:*:*:*
opera opera_browser 12.02 cpe:2.3:a:opera:opera_browser:12.02:*:*:*:*:*:*:*
opera opera_browser 12.10 cpe:2.3:a:opera:opera_browser:12.10:*:*:*:*:*:*:*
opera opera_browser 12.10 cpe:2.3:a:opera:opera_browser:12.10:beta:*:*:*:*:*:*
opera opera_browser 12.11 cpe:2.3:a:opera:opera_browser:12.11:*:*:*:*:*:*:*

References for CVE-2013-1639

cvelogic Threat Intelligence