CVE-2021-3393

Name: CVE-2021-3393
Creator: NVD / NIST
Published: 2021-04-01T14:15:13.657+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.19%

Last modified Jun 17, 2026

CVE-2021-3393 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. An information leak was discovered in postgresql in versions before 13.2, before 12.6 and before 11.11. A user having UPDATE permission but not SELECT permission to a particular column could craft queries which, under some circumstances, might disclose values from that column in error messages. EPSS estimates a 1.19% chance of exploitation in the next 30 days.

Description

An information leak was discovered in postgresql in versions before 13.2, before 12.6 and before 11.11. A user having UPDATE permission but not SELECT permission to a particular column could craft queries which, under some circumstances, might disclose values from that column in error messages. An attacker could use this flaw to obtain information stored in a column they are allowed to write but not read.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

1.19%

63.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-209

Affected Software

Vendor	Product	Versions
Postgresql	Postgresql	< 11.11
Postgresql	Postgresql	>= 12.0, < 12.6
Postgresql	Postgresql	>= 13.0, < 13.2
Redhat	Software Collections	All versions
Redhat	Enterprise Linux	8.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1924005Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202105-32Third Party Advisory
https://security.netapp.com/advisory/ntap-20210507-0006/Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1924005Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202105-32Third Party Advisory
https://security.netapp.com/advisory/ntap-20210507-0006/Third Party Advisory

Timeline

Published: Apr 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3393?

How severe is CVE-2021-3393?

CVE-2021-3393 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.19% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3393?

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-2021-3393?

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

Scan your code now

Source: NVD / NIST