CVE-2020-25694 [High] | Security Vulnerability in Postgresql

A flaw was found in PostgreSQL versions before 13.1, before 12.5, before 11.10, before 10.15, before 9.6.20 and before 9.5.24. If a client application that creates additional database connections only reuses the basic connection parameters while dropping security-relevant parameters, an opportunity for a man-in-the-middle attack, or the ability to observe clear-text transmissions, could exist. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-04	0.12%	0.36%	+0.24%
2	2026-03-01	0.36%	0.12%	-0.24%
3	2026-02-04	—	0.36%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-04

0.12%

0.36%

+0.24%

2026-03-01

0.36%

0.12%

-0.24%

2026-02-04

—

0.36%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.1	3.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.2	5.9	[email protected]
6.8	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:P/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	8.6	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.1

3.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.2

5.9

[email protected]

6.8

2.0

MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

8.6

6.4

[email protected]

OS Trackers for CVE-2020-25694

vendor	priority	summary	link
`alpine`	high	CVE-2020-25694: 4 source package rows (postgresql, postgresql12, postgresql14, postgresql15); 32 state rows across 13 repos (3.10-main, 3.11-main, 3.12-main, 3.17-community, 3.17-main, 3.18-community, 3.18-main, 3.19-community, 3.19-main, 3.20-community, 3.20-main, edge-community, edge-main); fixed 19, open 13.	https://security.alpinelinux.org/vuln/CVE-2020-25694
`debian`	not yet assigned	CVE-2020-25694 not yet assigned priority: Debian including 1 source packages (postgresql-13), 1 status rows across 1 suites (bullseye): resolved 1.	https://security-tracker.debian.org/tracker/CVE-2020-25694
`gentoo`	normal	CVE-2020-25694: 1 GLSA(s) (202012-07), 1 atom(s) (dev-db/postgresql); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-25694
`redhat`	high	—	https://access.redhat.com/security/cve/CVE-2020-25694
`suse`	medium	CVE-2020-25694 severity moderate: SUSE including 663 source package names (10.19:libpq5-13.1-5.3.15, 10.19:postgresql10-10.15-8.22.1, …), 1502 product×package rows across 95 product lines (Container suse/postgres, Container trento/trento-db, … (95 product lines)): Fixed 1100, Known Affected 231, Known Not Affected 171.	https://www.suse.com/security/cve/CVE-2020-25694/
`ubuntu`	medium	CVE-2020-25694 medium priority: Ubuntu including 5 source packages (postgresql-10, postgresql-12, postgresql-9.1, postgresql-9.3, postgresql-9.5), 80 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 70, released 7, deferred 1, ignored 1, needs-triage 1.	https://ubuntu.com/security/CVE-2020-25694

Affected software / configurations for CVE-2020-25694

Vendor	Product	Version	Raw CPE
postgresql	postgresql	< 9.5.24	cpe:2.3:a:postgresql:postgresql::::::::
postgresql	postgresql	>= 9.6.0, < 9.6.20	cpe:2.3:a:postgresql:postgresql::::::::
postgresql	postgresql	>= 10.0, < 10.15	cpe:2.3:a:postgresql:postgresql::::::::
postgresql	postgresql	>= 11.0, < 11.10	cpe:2.3:a:postgresql:postgresql::::::::
postgresql	postgresql	>= 12.0, < 12.5	cpe:2.3:a:postgresql:postgresql::::::::
postgresql	postgresql	>= 13.0, < 13.1	cpe:2.3:a:postgresql:postgresql::::::::
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*

References for CVE-2020-25694

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1894423	Issue Tracking
https://lists.debian.org/debian-lts-announce/2020/12/msg00005.html	Mailing List Patch Third Party Advisory
https://security.gentoo.org/glsa/202012-07	Third Party Advisory
https://security.netapp.com/advisory/ntap-20201202-0003/	Third Party Advisory
https://www.postgresql.org/support/security/	Vendor Advisory

URL

CVE-2020-25694

Exploit prediction scoring system (EPSS) score for CVE-2020-25694

Common vulnerability scoring system (CVSS) metrics for CVE-2020-25694

Weakness enumeration for CVE-2020-25694

OS Trackers for CVE-2020-25694

Affected software / configurations for CVE-2020-25694

References for CVE-2020-25694