CVE-2023-4539: Use of a hard-coded password for a special database account created during Comarch ERP XL installation allows

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HIGH 7.5REMOTEUPGRADE

CVE-2023-4539 is a high-severity flaw (CVSS 7.5) affecting erp xl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use of a hard-coded password for a special database account created during Comarch ERP XL installation allows an attacker to retrieve embedded sensitive data stored in the database. The password is same among all Comarch ERP XL installations. This issue affects ERP XL: from 2020.2.2 through 2023.2.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-798
Published	2024-02-15
Last modified	2026-06-17

Publisher (CNA): CERT.PL · Vendor: comarch

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

Am I affected?

Timeline

2024-02-15 09:15 UTCPublished CVE record published
2026-06-17 06:38 UTCUpdated Record last modified

comarch erp xl UPGRADE

Affected: >= 2020.2.2 and <= 2023.2

Fixed in: newer than 2023.2

Safe to downgrade to: a release before 2020.2.2

1. Check installed version

apt-cache policy erp-xl || rpm -q erp-xl || erp-xl --version

2. UPGRADE to newer than 2023.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade erp-xl

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade erp-xl

Note

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

3. If no update is available yet, DOWNGRADE to a release before 2020.2.2 (Debian / Ubuntu)

apt-cache madison erp-xl sudo apt install erp-xl=<VERSION_BEFORE_2020.2.2> sudo apt-mark hold erp-xl

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list erp-xl sudo dnf downgrade erp-xl-<VERSION_BEFORE_2020.2.2> sudo dnf versionlock add erp-xl

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-2023-4539?

erp xl: upgrade to newer than 2023.2. Exact commands for each OS are on this page.

Is CVE-2023-4539 being exploited?

CVE-2023-4539 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-2023-4539 affect?

CVE-2023-4539 affects erp xl. Severity is high (CVSS 7.5). Use of a hard-coded password for a special database account created during Comarch ERP XL installation allows an attacker to retrieve embedded sensitive data stored in the database. The password is same among all Comarch ERP XL installation

How urgent is CVE-2023-4539?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-4538 MEDIUM 6.2 UPGRADE The database access credentials configured during installation are stored in a special table, and are encrypte
CVE-2023-4537 HIGH 7.4 UPGRADE Comarch ERP XL client is vulnerable to MS SQL protocol downgrade request from a server side, what could lead t

References

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