CVE-2021-4309

Name: CVE-2021-4309
Creator: NVD / NIST
Published: 2023-01-08T17:15:17.947+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2021-4309 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A vulnerability, which was classified as problematic, has been found in 01-Scripts 01ACP. This issue affects some unknown processing. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.52%

40.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
01-Scripts	01acp	< 2021-09-15

References

https://github.com/01-Scripts/01ACP/commit/a16eb7da46ed22bc61067c212635394f2571d3c4Patch
https://vuldb.com/?ctiid.217649Third Party Advisory
https://vuldb.com/?id.217649Third Party Advisory
https://github.com/01-Scripts/01ACP/commit/a16eb7da46ed22bc61067c212635394f2571d3c4Patch
https://vuldb.com/?ctiid.217649Third Party Advisory
https://vuldb.com/?id.217649Third Party Advisory

Timeline

Published: Jan 8, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4309?

How severe is CVE-2021-4309?

CVE-2021-4309 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4309?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4309?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST