How severe is CVE-2021-3291?

CVE-2021-3291 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3291 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3291?

CVE-2021-3291 affects Zen-cart Zen Cart. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3291?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-3291 published?

CVE-2021-3291 was published on 2021-01-26 and last updated on 2026-06-17.

CVE-2021-3291

CVE-2021-3291 is a high-severity vulnerability in Zen-cart Zen Cart with a CVSS 3.x base score of 7.2. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Zen-cart Zen Cart
Published: 2021-01-26
Last modified: 2026-06-17

Description

Zen Cart 1.5.7b allows admins to execute arbitrary OS commands by inspecting an HTML radio input element (within the modules edit page) and inserting a command.

Frequently asked questions

What is CVE-2021-3291?: Zen Cart 1.5.7b allows admins to execute arbitrary OS commands by inspecting an HTML radio input element (within the modules edit page) and inserting a command.
How severe is CVE-2021-3291?: CVE-2021-3291 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3291 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3291?: CVE-2021-3291 affects Zen-cart Zen Cart. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3291?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-3291 published?: CVE-2021-3291 was published on 2021-01-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:zen-cart:zen_cart:1.5.7b:*:*:*:*:*:*:*

More vulnerabilities in Zen-cart Zen Cart

CVE-2006-0697 — Critical (CVSS 10.0): Zen Cart before 1.2.7 does not protect the admin/includes directory, which allows remote attackers to cause unknown…
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CVE-2017-11675 — High (CVSS 8.8): The traverseStrictSanitize function in admin_dir/includes/classes/AdminRequestSanitizer.php in ZenCart 1.5.5e…
CVE-2024-5762 — High (CVSS 8.1): Zen Cart findPluginAdminPage Local File Inclusion Remote Code Execution Vulnerability. This vulnerability allows remote…
CVE-2009-4323 — High (CVSS 7.5): The installation for Zen Cart stores sensitive information and insecure programs under the (1) docs, (2) extras, and…
CVE-2009-2254 — High (CVSS 7.5): Zen Cart 1.3.8a, 1.3.8, and earlier does not require administrative authentication for admin/sqlpatch.php, which allows…

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