CVE-2021-4304: A vulnerability was found in eprintsug ulcc-core

Q: How do I fix CVE-2021-4304?

ulcc-core: upgrade to 2021-02-05. Exact commands for each OS are on this page.

Q: Is CVE-2021-4304 being exploited?

CVE-2021-4304 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-2021-4304 affect?

CVE-2021-4304 affects ulcc-core. Severity is medium (CVSS 6.3). A vulnerability was found in eprintsug ulcc-core. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file cgi/toolbox/toolbox. The manipulation of the argument password leads to command injec

Q: How urgent is CVE-2021-4304?

Priority 43/100. No elevated risk signals yet.

This month

MEDIUM 6.3UPGRADE

CVE-2021-4304 is a medium-severity flaw (CVSS 6.3) affecting ulcc-core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in eprintsug ulcc-core. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file cgi/toolbox/toolbox. The manipulation of the argument password leads to command injection. The attack can be launched remotely. The patch is named 811edaae81eb044891594f00062a828f51b22cb1. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is V

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.2% (top 17%)
CISA exploited list	No
Weakness	CWE-77
Published	2023-01-05
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: ulcc-core project

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

Am I affected?

Timeline

2023-01-05 10:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

ulcc-core project ulcc-core UPGRADE

Affected: < 2021-02-05

Fixed in: 2021-02-05

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ulcc-core || rpm -q ulcc-core || ulcc-core --version

2. UPGRADE to 2021-02-05 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ulcc-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ulcc-core

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-2021-4304?

ulcc-core: upgrade to 2021-02-05. Exact commands for each OS are on this page.

Is CVE-2021-4304 being exploited?

CVE-2021-4304 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-2021-4304 affect?

CVE-2021-4304 affects ulcc-core. Severity is medium (CVSS 6.3). A vulnerability was found in eprintsug ulcc-core. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file cgi/toolbox/toolbox. The manipulation of the argument password leads to command injec

How urgent is CVE-2021-4304?

Priority 43/100. No elevated risk signals yet.

References

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