How severe is CVE-2012-5788?

CVE-2012-5788 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2012-5788 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-2012-5788?

CVE-2012-5788 affects Paypal Ipn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-5788?

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

When was CVE-2012-5788 published?

CVE-2012-5788 was published on 2012-11-04 and last updated on 2026-06-16.

CVE-2012-5788

CVE-2012-5788 is a medium-severity vulnerability in Paypal Ipn 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-20.

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-20
Affected product: Paypal Ipn
Published: 2012-11-04
Last modified: 2026-06-16

Description

The PayPal IPN utility 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, related to use of the PHP fsockopen function.

Frequently asked questions

What is CVE-2012-5788?: The PayPal IPN utility 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, related to use of the PHP fsockopen function.
How severe is CVE-2012-5788?: CVE-2012-5788 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2012-5788 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-2012-5788?: CVE-2012-5788 affects Paypal Ipn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-5788?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-5788 published?: CVE-2012-5788 was published on 2012-11-04 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:paypal:ipn:-:*:*:*:*:*:*:*

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