How severe is CVE-2012-5809?

CVE-2012-5809 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2012-5809 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-5809?

CVE-2012-5809 affects Groupon Groupon Merchants. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-5809?

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

When was CVE-2012-5809 published?

CVE-2012-5809 was published on 2012-11-04 and last updated on 2026-06-16.

CVE-2012-5809

CVE-2012-5809 is a medium-severity vulnerability in Groupon Groupon Merchants with a CVSS 2.0 base score of 5.8. 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-310.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Groupon Groupon Merchants
Published: 2012-11-04
Last modified: 2026-06-16

Description

The Groupon Redemptions application for Android does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

Frequently asked questions

What is CVE-2012-5809?: The Groupon Redemptions application for Android does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
How severe is CVE-2012-5809?: CVE-2012-5809 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2012-5809 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-5809?: CVE-2012-5809 affects Groupon Groupon Merchants. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-5809?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-5809 published?: CVE-2012-5809 was published on 2012-11-04 and last updated on 2026-06-16.

References

http://www.cs.utexas.edu/~shmat/shmat_ccs12.pdf

Affected products (1)

cpe:2.3:a:groupon:groupon_merchants:-:-:*:*:*:android:*:*

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