NVD / CVE Program· CNA mitre

CVE-2022-30550: An issue was discovered in the auth component in Dovecot 2.2 and 2.3 before 2.3.20.

Noroxi assessment

Priority: Monitor (action score 36/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 2.2% (FIRST EPSS); higher than 83.1% of all records.
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: dovecot (AlmaLinux:8) 1:2.3.16-3.el8; dovecot-devel (AlmaLinux:8) 1:2.3.16-3.el8; dovecot-mysql (AlmaLinux:8) 1:2.3.16-3.el8.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to dovecot (AlmaLinux:8) 1:2.3.16-3.el8; dovecot-devel (AlmaLinux:8) 1:2.3.16-3.el8; dovecot-mysql (AlmaLinux:8) 1:2.3.16-3.el8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An issue was discovered in the auth component in Dovecot 2.2 and 2.3 before 2.3.20. When two passdb configuration entries exist with the same driver and args settings, incorrect username_filter and mechanism settings can be applied to passdb definitions. These incorrectly applied settings can lead to an unintended security configuration and can permit privilege escalation in certain configurations. The documentation does not advise against the use of passdb definitions that have the same driver and args settings. One such configuration would be where an administrator wishes to use the same PAM configuration or passwd file for both normal and master users but use the username_filter setting to restrict which of the users is able to be a master user.

HighCVSS 8.8 · v3.1—No exploit Fix available

Auth bypass

Published: Jul 17, 2022
Updated: Jun 17, 2026
EPSS: 2.2% · 83th percentile
CWE: CWE-287

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 35 / 40 · 8.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 2.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
dovecot	dovecot	cpe:2.3:a:dovecot:dovecot
debian	debian linux	cpe:2.3:o:debian:debian_linux

Using dovecot? Add it to your stack and be the first to know about CVEs like this one. (Email server)

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

dovecot dovecot2.3 and later · before 2.4.0
dovecot dovecot2.2

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
AlmaLinux:8	dovecot	before 1:2.3.16-3.el8	1:2.3.16-3.el8
AlmaLinux:8	dovecot-devel	before 1:2.3.16-3.el8	1:2.3.16-3.el8
AlmaLinux:8	dovecot-mysql	before 1:2.3.16-3.el8	1:2.3.16-3.el8
AlmaLinux:8	dovecot-pgsql	before 1:2.3.16-3.el8	1:2.3.16-3.el8
AlmaLinux:8	dovecot-pigeonhole	before 1:2.3.16-3.el8	1:2.3.16-3.el8
AlmaLinux:9	dovecot	before 1:2.3.16-7.el9	1:2.3.16-7.el9
AlmaLinux:9	dovecot-devel	before 1:2.3.16-7.el9	1:2.3.16-7.el9
AlmaLinux:9	dovecot-mysql	before 1:2.3.16-7.el9	1:2.3.16-7.el9
AlmaLinux:9	dovecot-pgsql	before 1:2.3.16-7.el9	1:2.3.16-7.el9
AlmaLinux:9	dovecot-pigeonhole	before 1:2.3.16-7.el9	1:2.3.16-7.el9
Alpine:v3.17	dovecot	from 2.3 · before 2.3.19.1-r5	2.3.19.1-r5
Debian:10	dovecot	before 1:2.3.4.1-5+deb10u7	1:2.3.4.1-5+deb10u7
Debian:12	dovecot	before 1:2.3.19.1+dfsg1-2	1:2.3.19.1+dfsg1-2
openSUSE:Leap 15.3	dovecot23	before 2.3.15-150200.62.1	2.3.15-150200.62.1
Red Hat:enterprise_linux:8::appstream	dovecot	before 1:2.3.16-3.el8	1:2.3.16-3.el8
Red Hat:enterprise_linux:8::appstream	dovecot-debuginfo	before 1:2.3.16-3.el8	1:2.3.16-3.el8
Red Hat:enterprise_linux:8::appstream	dovecot-debugsource	before 1:2.3.16-3.el8	1:2.3.16-3.el8
Red Hat:enterprise_linux:8::appstream	dovecot-mysql	before 1:2.3.16-3.el8	1:2.3.16-3.el8
Red Hat:enterprise_linux:8::appstream	dovecot-mysql-debuginfo	before 1:2.3.16-3.el8	1:2.3.16-3.el8
Red Hat:enterprise_linux:8::appstream	dovecot-pgsql	before 1:2.3.16-3.el8	1:2.3.16-3.el8
Red Hat:enterprise_linux:8::appstream	dovecot-pgsql-debuginfo	before 1:2.3.16-3.el8	1:2.3.16-3.el8
Red Hat:enterprise_linux:8::appstream	dovecot-pigeonhole	before 1:2.3.16-3.el8	1:2.3.16-3.el8
Red Hat:enterprise_linux:8::appstream	dovecot-pigeonhole-debuginfo	before 1:2.3.16-3.el8	1:2.3.16-3.el8
Red Hat:enterprise_linux:8::crb	dovecot-devel	before 1:2.3.16-3.el8	1:2.3.16-3.el8

+16

Same product

dovecot: all records

Other highest-scoring records for the same primary product.

CVE-2019-11500In Dovecot before 2.2.36.4 and 2.3.x before 2.3.7.2 (and Pigeonhole before 0.5.7.2), protocol processing can fail for quoted strings.
58Plan
CVE-2020-7046lib-smtp in submission-login and lmtp in Dovecot 2.3.9 before 2.3.9.3 mishandles truncated UTF-8 data in command parameters, as demonstrated
45Plan
CVE-2016-8652The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash)
37Monitor

Published before and after this one in the same product

← EarlierCVE-2020-28200Jun 28, 2021 · The Sieve engine in Dovecot before 2.3.15 allows Uncontrolled Resource Consumption, as demonstrated by a situation with a complex regular ex
18Monitor
← EarlierCVE-2021-33515Jun 28, 2021 · The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp.
20Monitor
Later →CVE-2025-59028Mar 27, 2026 · When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fai
30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
almalinux:dovecot	1:2.3.16-3.el8 · AlmaLinux:8	Package registry (OSV)
almalinux:dovecot-devel	1:2.3.16-3.el8 · AlmaLinux:8	Package registry (OSV)
almalinux:dovecot-mysql	1:2.3.16-3.el8 · AlmaLinux:8	Package registry (OSV)
almalinux:dovecot-pgsql	1:2.3.16-3.el8 · AlmaLinux:8	Package registry (OSV)
almalinux:dovecot-pigeonhole	1:2.3.16-3.el8 · AlmaLinux:8	Package registry (OSV)
alpine:dovecot	2.3.19.1-r5 · Alpine:v3.17	Package registry (OSV)
debian:dovecot	1:2.3.19.1+dfsg1-2 · Debian:12	Package registry (OSV)
opensuse:dovecot23	2.3.15-150200.62.1 · openSUSE:Leap 15.3	Package registry (OSV)
red hat:dovecot	1:2.3.16-3.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:dovecot-debuginfo	1:2.3.16-3.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:dovecot-debugsource	1:2.3.16-3.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:dovecot-devel	1:2.3.16-3.el8 · Red Hat:enterprise_linux:8::crb	Package registry (OSV)
red hat:dovecot-mysql	1:2.3.16-3.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:dovecot-mysql-debuginfo	1:2.3.16-3.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:dovecot-pgsql	1:2.3.16-3.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:dovecot-pgsql-debuginfo	1:2.3.16-3.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:dovecot-pigeonhole	1:2.3.16-3.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:dovecot-pigeonhole-debuginfo	1:2.3.16-3.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
rocky linux:dovecot	1:2.3.16-3.el8 · Rocky Linux:8	Package registry (OSV)
suse:dovecot22	2.2.31-19.29.1 · SUSE:OpenStack Cloud 9	Package registry (OSV)
suse:dovecot23	2.3.15-150000.4.42.1 · SUSE:Linux Enterprise High Performance Computing 15-ESPOS	Package registry (OSV)
suse:dovecot23	2.3.15-150200.62.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP3	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days+1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-22-0643 · Sep 27, 2022(Debian Güvenlik Güncellemesi)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-287 · Improper Authentication

CVSS vector

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

nvd-primary

Root cause

Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

The bug in code

The whole CWE-287 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1app.use("/admin", requireSession, adminRouter);
2

3// Route added later skips the middleware
4app.post("/admin-api/config", updateConfig);

Fixed

1const admin = express.Router();
2admin.use(requireSession, requireRole("admin"));
3

4admin.post("/config", updateConfig);
5app.use("/admin", admin);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Change log

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

For records you follow, these changes also arrive as notifications. →

References

dovecot.org/security

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records