CVE-2021-2303

Name: CVE-2021-2303
Creator: NVD / NIST
Published: 2021-04-22T22:15:17.23+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.9/10EPSS 1.45%

Last modified Jun 17, 2026

CVE-2021-2303 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. Vulnerability in the OSS Support Tools product of Oracle Support Tools (component: Diagnostic Assistant). The supported version that is affected is Prior to 2.12.41. EPSS estimates a 1.45% chance of exploitation in the next 30 days.

Description

Vulnerability in the OSS Support Tools product of Oracle Support Tools (component: Diagnostic Assistant). The supported version that is affected is Prior to 2.12.41. Easily exploitable vulnerability allows high privileged attacker with network access via HTTP to compromise OSS Support Tools. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all OSS Support Tools accessible data. CVSS 3.1 Base Score 4.9 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N).

Metrics

CVSS 3.1

4.9/10

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

EPSS Probability

1.45%

70.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Oracle	Oss Support Tools	< 2.12.41

References

https://www.oracle.com/security-alerts/cpuapr2021.htmlPatch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-458/Third Party Advisory, VDB Entry
https://www.oracle.com/security-alerts/cpuapr2021.htmlPatch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-458/Third Party Advisory, VDB Entry

Timeline

Published: Apr 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-2303?

How severe is CVE-2021-2303?

CVE-2021-2303 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.

How do I fix CVE-2021-2303?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-2303?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST