CVE-2021-3291

Exp

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.

Published: 2021-01-26 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-3291 is rated High Exploit Risk (78.8/100): CVSS High severity, with high exploitation likelihood (EPSS 32.61%, 97th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.13% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-3291

EDB-ID Source Kind Published Link
49608 exploit_db edb 2021-03-02 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-3291

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-25 31.48% 32.61% +1.13%
2 2026-02-23 37.76% 31.48% -6.28%
3 2026-01-09 — 37.76% —

Full EPSS history (37 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-3291

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.2 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.2 5.9 [email protected]
9.0 2.0 HIGH
AV:N/AC:L/Au:S/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.0 10.0 [email protected]

Weakness enumeration for CVE-2021-3291

GitHub Security Advisory for CVE-2021-3291

GHSA-38f9-4vhq-9cr8 · Severity: high · Ecosystem: composer — Zen Cart vulnerable to authenticated remote code execution

Affected software / configurations for CVE-2021-3291

Vendor Product Version Raw CPE
zen-cart zen_cart 1.5.7b cpe:2.3:a:zen-cart:zen_cart:1.5.7b:*:*:*:*:*:*:*

References for CVE-2021-3291

cvelogic Threat Intelligence