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CVE-2020-4828

20
FAUCET Score

CVE-2020-4828 describes a web cache poisoning vulnerability in IBM API Connect versions 10.0.0.0 through 10.0.1.0 and 2018.4.1.0 through 2018.4.1.13, stemming from improper input validation of HTTP request headers. This medium-severity vulnerability has a CVSS score of 6.5, indicating a network-based attack with low attack complexity that could lead to limited confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion, suggesting a low current threat landscape.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2018.4.1.0, <= 2018.4.1.13CPE matchmatch criteria
cpe:2.3:a:ibm:api_connect:*:*:*:*:*:*:*:*
10.0.0.0CPE matchmatch criteria
cpe:2.3:a:ibm:api_connect:10.0.0.0:*:*:*:*:*:*:*
10.0.1.0CPE matchmatch criteria
cpe:2.3:a:ibm:api_connect:10.0.1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.81%
Probability of exploitation in next 30 days
EPSS Percentile
53.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0081 is in the 33rd percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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/189842
VDB EntryVendor Advisory
ibm.com / support/pages/node/6410498
Vendor Advisory