CVE-2020-25275

Name: CVE-2020-25275
Creator: NVD / NIST
Published: 2021-01-04T17:15:13.93+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 4.66%

Last modified Jun 17, 2026

CVE-2020-25275 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Dovecot before 2.3.13 has Improper Input Validation in lda, lmtp, and imap, leading to an application crash via a crafted email message with certain choices for ten thousand MIME parts.. EPSS estimates a 4.66% chance of exploitation in the next 30 days.

Description

Dovecot before 2.3.13 has Improper Input Validation in lda, lmtp, and imap, leading to an application crash via a crafted email message with certain choices for ten thousand MIME parts.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

4.66%

90.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Dovecot	Dovecot	< 2.3.13
Debian	Debian Linux	10.0
Fedoraproject	Fedora	32

References

http://packetstormsecurity.com/files/160841/Dovecot-2.3.11.3-Denial-Of-Service.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Jan/18Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/04/3Mailing List, Third Party Advisory
https://dovecot.org/pipermail/dovecot-news/2021-January/000451.htmlMailing List, Vendor Advisory
https://dovecot.org/securityVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GXDKFLOCUP7I4ELGQ2F4P5TGC6NXMYV7/
https://security.gentoo.org/glsa/202101-01Third Party Advisory
https://www.debian.org/security/2021/dsa-4825Third Party Advisory
http://packetstormsecurity.com/files/160841/Dovecot-2.3.11.3-Denial-Of-Service.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Jan/18Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/04/3Mailing List, Third Party Advisory
https://dovecot.org/pipermail/dovecot-news/2021-January/000451.htmlMailing List, Vendor Advisory
https://dovecot.org/securityVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GXDKFLOCUP7I4ELGQ2F4P5TGC6NXMYV7/
https://security.gentoo.org/glsa/202101-01Third Party Advisory
https://www.debian.org/security/2021/dsa-4825Third Party Advisory

Timeline

Published: Jan 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25275?

Dovecot before 2.3.13 has Improper Input Validation in lda, lmtp, and imap, leading to an application crash via a crafted email message with certain choices for ten thousand MIME parts.

How severe is CVE-2020-25275?

CVE-2020-25275 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.66% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25275?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-25275?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST