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01 Record

CVE-2021-33515

The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address.

UnratedPUBLISHEDCNA: mitre
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address.

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
2.85% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 86.4% of scored records. A rank, not a probability.
NVD base score
4.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-06-28 12:04Z5 YR AGO
Last updated
2024-08-03 23:50Z2 YR AGO
Reserved
2021-05-24
Assigning CNA
mitre
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class
Data version
5.1
Document digest
5566c55b2684bb30370375fd28047056157891260083b6558206810553be6d50

05 Affected products

VendorProductVersionsPlatforms
debiandebian_linuxNot specified—
dovecotdovecotNot specified—
fedoraprojectfedoraNot specified—
redhatenterprise_linuxNot specified—

06 References

07 Fixed in

AlmaLinux 8

  • dovecot
    Fixed in 1:2.3.16-2.el8
  • dovecot-devel
    Fixed in 1:2.3.16-2.el8
  • dovecot-mysql
    Fixed in 1:2.3.16-2.el8
  • dovecot-pgsql
    Fixed in 1:2.3.16-2.el8
  • dovecot-pigeonhole
    Fixed in 1:2.3.16-2.el8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Arch Linux

  • dovecot
    Fixed in 2.3.15-1

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 8

  • dovecot
    Fixed in 1:2.3.16-2.el8
  • dovecot-devel
    Fixed in 1:2.3.16-2.el8
  • dovecot-mysql
    Fixed in 1:2.3.16-2.el8
  • dovecot-pgsql
    Fixed in 1:2.3.16-2.el8
  • dovecot-pigeonhole
    Fixed in 1:2.3.16-2.el8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • dovecot
    Fixed in 1:2.3.13+dfsg1-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • dovecot
    Fixed in 1:2.3.13+dfsg1-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • dovecot
    Fixed in 1:2.3.13+dfsg1-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • dovecot
    Fixed in 1:2.3.7.2-1ubuntu3.4

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.