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TI-2021-12917 Aliases CVE-2021-33515GHSA-pwmq-cvcm-r5p2

The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in…

Priority LOW 27CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
Low · Low · None
Fix status
Partial Red Hat: 2 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-77.

Summary

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.

Why it matters now

EPSS 0.0285 86th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 2 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*before 2.3.14.1VulnerableThe Dovecot Project
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:* Versions before 2.3.14.1 Vulnerable ·The Dovecot Project
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

Red Hat 1 advisory

  • RHSA-2022:1950 Released 2022-05-10 · Red Hat rating Moderate
    dovecot security update
    • Red Hat Enterprise Linux AppStream (v. 8) dovecot-1:2.3.16-2.el8, dovecot-mysql-1:2.3.16-2.el8, dovecot-pgsql-1:2.3.16-2.el8 +1
    • Red Hat Enterprise Linux CRB (v. 8) dovecot-1:2.3.16-2.el8, dovecot-devel-1:2.3.16-2.el8

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2022:1950
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2022:1950
Not affected: 1 product
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-33515
  2. 2026-10-03 Alias added: GHSA-pwmq-cvcm-r5p2

References

Advisory 6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences