How severe is CVE-2021-4309?

CVE-2021-4309 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-4309 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-4309?

CVE-2021-4309 affects 01-scripts 01acp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-4309?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-4309 published?

CVE-2021-4309 was published on 2023-01-08 and last updated on 2026-06-17.

CVE-2021-4309

CVE-2021-4309 is a low-severity vulnerability in 01-scripts 01acp with a CVSS 3.x base score of 3.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: 01-scripts 01acp
Published: 2023-01-08
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-4309?: 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.
How severe is CVE-2021-4309?: CVE-2021-4309 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-4309 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-4309?: CVE-2021-4309 affects 01-scripts 01acp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-4309?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-4309 published?: CVE-2021-4309 was published on 2023-01-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:01-scripts:01acp:*:*:*:*:*:*:*:*

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