CVE-2021-22523: XML External Entity vulnerability in Micro Focus Verastream Host Integrator, affecting version 7.8 Update 1 an

Q: How do I fix CVE-2021-22523?

verastream host integrator: upgrade to 7.8. Exact commands for each OS are on this page.

Q: Is CVE-2021-22523 being exploited?

CVE-2021-22523 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-22523 affect?

CVE-2021-22523 affects verastream host integrator. Severity is high (CVSS 7.6). XML External Entity vulnerability in Micro Focus Verastream Host Integrator, affecting version 7.8 Update 1 and earlier versions. The vulnerability could allow the control of web browser and hijacking user sessions.

This month

HIGH 7.6UPGRADE

CVE-2021-22523 is a high-severity flaw (CVSS 7.6) affecting verastream host integrator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

XML External Entity vulnerability in Micro Focus Verastream Host Integrator, affecting version 7.8 Update 1 and earlier versions. The vulnerability could allow the control of web browser and hijacking user sessions.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-611
Published	2021-07-22
Last modified	2026-06-17

Publisher (CNA): OpenText · Vendor: microfocus

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-07-22 12:15 UTCPublished CVE record published
2026-06-17 03:37 UTCUpdated Record last modified

microfocus verastream host integrator UPGRADE

Affected: < 7.8 · 7.8 · 7.8 update_1

Fixed in: 7.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy verastream-host-integrator || rpm -q verastream-host-integrator || verastream-host-integrator --version

2. UPGRADE to 7.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade verastream-host-integrator

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade verastream-host-integrator

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-22523?

verastream host integrator: upgrade to 7.8. Exact commands for each OS are on this page.

Is CVE-2021-22523 being exploited?

CVE-2021-22523 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-22523 affect?

CVE-2021-22523 affects verastream host integrator. Severity is high (CVSS 7.6). XML External Entity vulnerability in Micro Focus Verastream Host Integrator, affecting version 7.8 Update 1 and earlier versions. The vulnerability could allow the control of web browser and hijacking user sessions.

How urgent is CVE-2021-22523?

Priority 41/100. High severity

Related CVEs

CVE-2021-22522 HIGH 7.1 UPGRADE Reflected Cross-Site Scripting vulnerability in Micro Focus Verastream Host Integrator, affecting version vers
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CVE-2019-11654 HIGH 7.5 DOWNGRADE Path traversal vulnerability in Micro Focus Verastream Host Integrator (VHI), versions 7.7 SP2 and earlier, Th
CVE-2013-3626 HIGH 9.3 DOWNGRADE Directory traversal vulnerability in the Session Server in Attachmate Verastream Host Integrator (VHI) 6.0 thr

References

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