Skip to content
Fencer Intel
medium 5.4

CVE-2021-39028 json

IBM Engineering Lifecycle Optimization - Publishing 6.0.6, 6.0.6.1, 7.0, 7.0.1, and 7.0.2 is vulnerable to HTTP header injection, caused by…

published 4y ago modified 4mo ago also EUVD-2021-25465

cvss
5.4
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

IBM Engineering Lifecycle Optimization - Publishing 6.0.6, 6.0.6.1, 7.0, 7.0.1, and 7.0.2 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking. IBM X-Force ID: 213866.

Patch / fix

Is CVE-2021-39028 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 5.4 CVSS:3.0/C:L/PR:L/I:L/UI:N/A:N/AV:N/S:U/AC:L/RL:O/E:U/RC:C
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CNA 3.0 5.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected products

  • IBM Engineering Lifecycle Optimization Publishing

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.