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CVE-2019-4538

26
FAUCET Score

CVE-2019-4538 describes an open redirect vulnerability in IBM Security Directory Server 6.4.0, allowing remote attackers to conduct phishing attacks. This vulnerability has a CVSSv3 score of 8.2 (High) due to its network-based attack vector, low attack complexity, and potential for high impact on integrity and low impact on confidentiality, requiring user interaction. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the risk of successful phishing via URL spoofing remains.

Impacted Technologies

VendorProductVersion(s)CPE
6.4.0CPE matchmatch criteria
cpe:2.3:a:ibm:security_directory_server:6.4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.4HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
4.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.29%
Probability of exploitation in next 30 days
EPSS Percentile
67.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0129 is in the 66th percentile among its peer group of 14,852 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/165660
VDB EntryVendor Advisory
ibm.com / support/pages/node/1077045
PatchVendor Advisory