Which products and versions are affected by CVE-2021-39378?

Affected: Opensis (Os4ed) versions 8.0. The full list is in the CVE brief.

Is CVE-2021-39378 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2021-39378 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2021-39378?

No public exploit code is known.

Is there a fix for CVE-2021-39378?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2021-39378 be patched?

Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.

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WatchlistCritical

CVE-2021-39378Opensis SQL Injection

A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the application database.

Published Sep 1, 2021 · Updated Aug 27, 2026

Key Facts

Patch in the next maintenance window

CVE-2021-39378 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Opensis (Os4ed).
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 23% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.

Scores

CVSS v3.1

9.8

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

EPSS (30-day exploit likelihood)

23%

Higher than 97.7% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

37/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

advisoryhttps://github.com/OS4ED/openSIS-Classic

Description

A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the application database. A malicious attacker can issue SQL commands to the MySQL (MariaDB) database through the NamesList.php str parameter.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
OpensisOs4ed	8.0	n/a

Timeline

Publicly disclosed
Sep 1, 2021
Last updated
Aug 27, 2026

Weakness Type

CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

References

FAQ

Common Questions.

A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the application database.
Affected: Opensis (Os4ed) versions 8.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.

Is CVE-2021-39378 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.