CVE-2021-4309: A vulnerability, which was classified as problematic, has been found in 01-Scripts 01ACP

Q: How do I fix CVE-2021-4309?

01acp: upgrade to 2021-09-15. Exact commands for each OS are on this page.

Q: Is CVE-2021-4309 being exploited?

CVE-2021-4309 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-2021-4309 affect?

CVE-2021-4309 affects 01acp. Severity is low (CVSS 3.5). A vulnerability, which was classified as problematic, has been found in 01-Scripts 01ACP. This issue affects some unknown processing. The manipulation of the argument $_SERVER['SCRIPT_NAME'] leads to cross site scripting. The attack may be

Q: How urgent is CVE-2021-4309?

Priority 24/100. No elevated risk signals yet.

Routine

LOW 3.5UPGRADE

CVE-2021-4309 is a low-severity flaw (CVSS 3.5) affecting 01acp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability, which was classified as problematic, has been found in 01-Scripts 01ACP. This issue affects some unknown processing. The manipulation of the argument $_SERVER['SCRIPT_NAME'] leads to cross site scripting. The attack may be initiated remotely. The identifier of the patch is a16eb7da46ed22bc61067c212635394f2571d3c4. It is recommended to apply a patch to fix this issue. The identifier VDB-217649 was assigned to this vulnerability.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.5 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-01-08
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: 01-scripts

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

Am I affected?

Timeline

2023-01-08 17:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

01-scripts 01acp UPGRADE

Affected: < 2021-09-15

Fixed in: 2021-09-15

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy 01acp || rpm -q 01acp || 01acp --version

2. UPGRADE to 2021-09-15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade 01acp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade 01acp

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-2021-4309?

01acp: upgrade to 2021-09-15. Exact commands for each OS are on this page.

Is CVE-2021-4309 being exploited?

CVE-2021-4309 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-2021-4309 affect?

CVE-2021-4309 affects 01acp. Severity is low (CVSS 3.5). A vulnerability, which was classified as problematic, has been found in 01-Scripts 01ACP. This issue affects some unknown processing. The manipulation of the argument $_SERVER['SCRIPT_NAME'] leads to cross site scripting. The attack may be

How urgent is CVE-2021-4309?

Priority 24/100. No elevated risk signals yet.

References

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