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CVE-2025-2291

30
FAUCET Score

CVE-2025-2291 is a critical vulnerability affecting PgBouncer, where an attacker can bypass password expiration policies. This flaw allows continued access using passwords that should be invalid, impacting Debian Linux and PgBouncer installations. With a CVSS score of 9.8 (CRITICAL), the vulnerability is easily exploitable over the network with no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.24.1CPE matchmatch criteria
cpe:2.3:a:pgbouncer:pgbouncer:*:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 5th percentile among its peer group of 36,821 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

microsoftpatch availablevia msrc
Product: 20298-17086Fixed in: 1.24.1-1
microsoftpatch availablevia msrc
Product: 18855-17086Fixed in: 1.24.1-1
microsoftpatch availablevia msrc
Product: 19349-16823Fixed in: 1.24.1-1
microsoftpatch availablevia msrc
Product: 19350-17084Fixed in: 1.24.1-1
microsoftpatch availablevia msrc
Product: 20295-17084Fixed in: 1.24.1-1
microsoftpatch availablevia msrc
Product: cbl2 pgbouncer 1.16.1-1 on CBL Mariner 2.0Fixed in: 1.24.1-1
microsoftpatch availablevia msrc
Product: cbl2 pgbouncer 1.24.1-1 on CBL Mariner 2.0Fixed in: 1.24.1-1
microsoftpatch availablevia msrc
Product: azl3 pgbouncer 1.24.1-1 on Azure Linux 3.0Fixed in: 1.24.1-1
microsoftpatch availablevia msrc
Product: azl3 pgbouncer 1.20.1-1 on Azure Linux 3.0Fixed in: 1.24.1-1

Vendor Advisories (1)

microsoft2025-Apr/CVE-2025-2291

PgBouncer default auth_query does not take Postgres password expiry into account

Apr 8, 2025

References

lists.debian.org / debian-lts-announce/2025/05/msg00032.html
Mailing ListThird Party Advisory
pgbouncer.org / changelog.html
Release Notes