CVE-2023-27283: IBM Aspera Orchestrator 4.0.1 could allow a remote attacker to enumerate usernames due to observable response

Routine

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2023-27283 is a medium-severity flaw (CVSS 5.3) affecting aspera orchestrator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM Aspera Orchestrator 4.0.1 could allow a remote attacker to enumerate usernames due to observable response discrepancies. IBM X-Force ID: 248545.

Why this priority

Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-204, CWE-203
Published	2024-05-04
Last modified	2026-06-17

Publisher (CNA): IBM Corporation · Vendor: ibm

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

Am I affected?

Timeline

2024-05-04 14:16 UTCPublished CVE record published
2026-06-17 05:44 UTCUpdated Record last modified

ibm aspera orchestrator DOWNGRADE

Affected: 4.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.1

1. Check installed version

apt-cache policy aspera-orchestrator || rpm -q aspera-orchestrator || aspera-orchestrator --version

2. No fixed release: DOWNGRADE to a release before 4.0.1 (Debian / Ubuntu)

apt-cache madison aspera-orchestrator sudo apt install aspera-orchestrator=<VERSION_BEFORE_4.0.1> sudo apt-mark hold aspera-orchestrator

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list aspera-orchestrator sudo dnf downgrade aspera-orchestrator-<VERSION_BEFORE_4.0.1> sudo dnf versionlock add aspera-orchestrator

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2023-27283?

aspera orchestrator: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-27283 being exploited?

CVE-2023-27283 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-2023-27283 affect?

CVE-2023-27283 affects aspera orchestrator. Severity is medium (CVSS 5.3). IBM Aspera Orchestrator 4.0.1 could allow a remote attacker to enumerate usernames due to observable response discrepancies. IBM X-Force ID: 248545.

How urgent is CVE-2023-27283?

Priority 34/100. Remotely exploitable, no login, no user action

Related CVEs

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CVE-2023-38001 MEDIUM 6.5 DOWNGRADE IBM Aspera Orchestrator 4.0.1 is vulnerable to cross-site request forgery which could allow an attacker to exe
CVE-2023-37407 HIGH 8.8 DOWNGRADE IBM Aspera Orchestrator 4.0.1 could allow a remote authenticated attacker to execute arbitrary commands on the
CVE-2023-26289 MEDIUM 5.4 DOWNGRADE IBM Aspera Orchestrator 4.0.1 is vulnerable to HTTP header injection, caused by improper validation of input b

References

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