What is CVE-2021-3515?

CVE-2021-3515 is a medium-severity vulnerability in 2ndquadrant Pglogical, classified under Command Injection. CVSS score: 6.7/10. Published 2021-06-01.

How severe is CVE-2021-3515?

Medium severity. CVSS v3 base score is 6.7 out of 10.

RCE in 2ndquadrant Pglogical

CVE-2021-3515

A shell injection flaw was found in pglogical in versions before 2.3.4 and before 3.6.26. An attacker with CREATEDB privileges on a PostgreSQL server can craft a database name that allows execution of shell commands as the postgresql user when calling pglogical.create_subscription().

Vulnerability class: Command Injection (OS Command Injection)

Published 2021-06-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.6th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

2ndquadrant Pglogical
Pglogical — versions pglogical 2.3.4, pglogical 3.6.26

Weakness classification (CWE)

References

bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-3515?: CVE-2021-3515 is a medium-severity vulnerability in 2ndquadrant Pglogical, classified under Command Injection. CVSS score: 6.7/10. Published 2021-06-01.
How severe is CVE-2021-3515?: Medium severity. CVSS v3 base score is 6.7 out of 10.