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CVE-2021-39028

20
FAUCET Score

CVE-2021-39028 describes an HTTP header injection vulnerability in IBM Engineering Lifecycle Optimization - Publishing versions 6.0.6 through 7.0.2, stemming from improper validation of HOST headers. This medium-severity flaw (CVSS 5.4) could enable attacks like cross-site scripting, cache poisoning, or session hijacking, requiring low privileges and user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
6.0.6CPE matchmatch criteria
cpe:2.3:a:ibm:engineering_lifecycle_optimization_-_publishing:6.0.6:*:*:*:*:*:*:*
6.0.6.1CPE matchmatch criteria
cpe:2.3:a:ibm:engineering_lifecycle_optimization_-_publishing:6.0.6.1:*:*:*:*:*:*:*
7.0.1CPE matchmatch criteria
cpe:2.3:a:ibm:engineering_lifecycle_optimization_-_publishing:7.0.1:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:ibm:engineering_lifecycle_optimization_publishing:7.0:*:*:*:*:*:*:*
7.0.2CPE matchmatch criteria
cpe:2.3:a:ibm:engineering_lifecycle_optimization_publishing:7.0.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.51%
Probability of exploitation in next 30 days
EPSS Percentile
40.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 62nd percentile among its peer group of 15,239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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/213866
VDB EntryVendor Advisory
ibm.com / support/pages/node/6603347
PatchVendor Advisory