How severe is CVE-2011-0231?

CVE-2011-0231 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-0231 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-0231?

CVE-2011-0231 primarily affects Apple Mac Os X. In total, 136 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-0231?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-0231 published?

CVE-2011-0231 was published on 2011-10-14 and last updated on 2026-06-16.

CVE-2011-0231

CVE-2011-0231 is a medium-severity vulnerability in Apple Mac Os X 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-200.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Apple Mac Os X
Published: 2011-10-14
Last modified: 2026-06-16

Description

CFNetwork in Apple Mac OS X before 10.7.2 does not properly follow an intended cookie-storage policy, which makes it easier for remote web servers to track users via a cookie, related to a "synchronization issue."

Frequently asked questions

What is CVE-2011-0231?: CFNetwork in Apple Mac OS X before 10.7.2 does not properly follow an intended cookie-storage policy, which makes it easier for remote web servers to track users via a cookie, related to a "synchronization issue."
How severe is CVE-2011-0231?: CVE-2011-0231 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-0231 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0231?: CVE-2011-0231 primarily affects Apple Mac Os X. In total, 136 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0231?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-0231 published?: CVE-2011-0231 was published on 2011-10-14 and last updated on 2026-06-16.

References

Affected products (136)

cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.0.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.0.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.0.2:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.0.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.0.4:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.1.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.1.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.1.2:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.1.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.1.4:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.1.5:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.2:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.2.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.2.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.2.2:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.2.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.2.4:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.2.5:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.2.6:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.2.7:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.2.8:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3.2:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3.4:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3.5:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3.6:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3.7:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3.8:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.3.9:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.4:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.4.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.4.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.4.2:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.4.3:*:*:*:*:*:*:*

More vulnerabilities in Apple Mac Os X

CVE-2018-4310 — Critical (CVSS 10.0): An access issue was addressed with additional sandbox restrictions. This issue affected versions prior to iOS 12, macOS…
CVE-2019-6235 — Critical (CVSS 10.0): A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 12.1.3, macOS Mojave…
CVE-2018-4229 — Critical (CVSS 10.0): An issue was discovered in certain Apple products. macOS before 10.13.5 is affected. The issue involves the "Grand…
CVE-2018-4091 — Critical (CVSS 10.0): An issue was discovered in certain Apple products. macOS before 10.13.3 is affected. The issue involves the "Sandbox"…
CVE-2015-8659 — Critical (CVSS 10.0): The idle stream handling in nghttp2 before 1.6.0 allows attackers to have unspecified impact via unknown vectors, aka a…
CVE-2015-7071 — Critical (CVSS 10.0): The File Bookmark component in Apple OS X before 10.11.2 allows attackers to bypass a sandbox protection mechanism for…

All CVEs affecting Apple Mac Os X →

Other CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities

CVE-2026-27604 — Critical (CVSS 10.0): FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version…
CVE-2026-40965 — Critical (CVSS 10.0): Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a…
CVE-2026-42826 — Critical (CVSS 10.0): Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose…
CVE-2025-29270 — Critical (CVSS 10.0): Incorrect access control in the realtime.cgi endpoint of Deep Sea Electronics devices DSE855 v1.1.0 to v1.1.26 allows…
CVE-2025-61481 — Critical (CVSS 10.0): An issue in MikroTik RouterOS v.7.14.2 and SwOS v.2.18 exposes the WebFig management interface over cleartext HTTP by…
CVE-2025-53624 — Critical (CVSS 10.0): The Docusaurus gists plugin adds a page to your Docusaurus instance, displaying all public gists of a GitHub user.…

Browse all CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities →