How severe is CVE-2021-28294?

CVE-2021-28294 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-28294 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28294?

CVE-2021-28294 affects Online Ordering System Project Online Ordering System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28294?

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

When was CVE-2021-28294 published?

CVE-2021-28294 was published on 2021-03-16 and last updated on 2026-06-17.

CVE-2021-28294

CVE-2021-28294 is a critical-severity vulnerability in Online Ordering System Project Online Ordering System with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Online Ordering System Project Online Ordering System
Published: 2021-03-16
Last modified: 2026-06-17

Description

Online Ordering System 1.0 is vulnerable to arbitrary file upload through /onlineordering/GPST/store/initiateorder.php, which may lead to remote code execution (RCE).

Frequently asked questions

What is CVE-2021-28294?: Online Ordering System 1.0 is vulnerable to arbitrary file upload through /onlineordering/GPST/store/initiateorder.php, which may lead to remote code execution (RCE).
How severe is CVE-2021-28294?: CVE-2021-28294 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-28294 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28294?: CVE-2021-28294 affects Online Ordering System Project Online Ordering System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28294?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-28294 published?: CVE-2021-28294 was published on 2021-03-16 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/49615

Affected products (1)

cpe:2.3:a:online_ordering_system_project:online_ordering_system:1.0:*:*:*:*:*:*:*

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