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CVE-2012-5789

19
FAUCET Score

CVE-2012-5789 describes a critical vulnerability in the PayPal Payments Standard PHP Library prior to version 20120427, where the library fails to properly validate SSL server hostnames against X.509 certificate fields. This oversight allows man-in-the-middle (MitM) attackers to spoof legitimate SSL servers using any valid certificate, effectively bypassing security measures. The vulnerability carries a CVSS score of 5.8 (medium severity), indicating a network-based attack with medium complexity that could lead to partial compromise of confidentiality and integrity. Despite its potential impact, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:paypal:payments_standard:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.8MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
43.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 7th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/79912
cs.utexas.edu / ~shmat/shmat_ccs12.pdf
Exploit