CVE-2021-3515

A shell injection flaw was found in pglogical in versions before 2.3.4 and before 3.6.26. An...

6.7 MediumFix available

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().

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.46%Down 0.3 points since Jun 2, 2021

What each source reports

NVD Score used 6.7

Record: CVE-2021-3515
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.2 HighAV:L/AC:L/Au:N/C:C/I:C/A:C
Weakness: CWE-77, CWE-78
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-3515
Weakness: CWE-77
Updated: 2026-11-02

EUVDEUVD-2021-26833 No score

Record: EUVD-2021-26833
Updated: 2026-11-03

GitHub AdvisoriesGHSA-pg8h-w6r7-prw8 6.7

A shell injection flaw was found in pglogical in versions before 2.3.4 and before 3.6.26. An...

Record: GHSA-pg8h-w6r7-prw8
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-77, CWE-78
Updated: 2026-11-02

OSV 6.7

Record: CVE-2021-3515
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2021-3515 6.7

Record: DEBIAN-CVE-2021-3515
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-3515 6.7

Record: UBUNTU-CVE-2021-3515
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`pglogical` Debian:12	before 2.3.3-3	2.3.3-3
`pglogical` Debian:13	before 2.3.3-3	2.3.3-3
`pglogical` Debian:14	before 2.3.3-3	2.3.3-3
`pglogical` Ubuntu:18.04:LTS	All versions, plus listed versions 2.0.0-12.1.0-12.1.1-1	None known
`pglogical` Ubuntu:20.04:LTS	All versions, plus listed versions 2.2.2-12.3.0-1	None known
`pglogical` Ubuntu:22.04:LTS	All versions, plus listed versions 2.3.3-32.4.0-22.4.1-1	None known
`pglogical` Ubuntu:24.04:LTS	All versions, plus listed versions 2.4.3-1ubuntu12.4.4-1	None known
`pglogical` Ubuntu:25.10	All versions, plus listed versions 2.4.5-12.4.5-1build1	None known
`pglogical` Ubuntu:26.10	All versions, plus listed versions 2.4.6-22.4.7-12.4.8-1	None known
`pglogical` Ubuntu:26.04:LTS	All versions, plus listed versions 2.4.5-1build12.4.6-12.4.6-2	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-3515 is a medium vulnerability (CVSS 6.7) in 2ndquadrant Pglogical, published June 1, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.46%, the 39th percentile. Fixed in pglogical 2.3.3-3.