HOMEVULNERABILITIESCVE-2019-19783
MEDIUM

CVE-2019-19783

CWE-269Published: December 16, 2019· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

An issue was discovered in Cyrus IMAP before 2.5.15, 3.0.x before 3.0.13, and 3.1.x through 3.1.8. If sieve script uploading is allowed (3.x) or certain non-default sieve options are enabled (2.x), a user with a mail account on the service can use a sieve script containing a fileinto directive to create any mailbox with administrator privileges, because of folder mishandling in autosieve_createfolder() in imap/lmtp_sieve.c.

NVD Source

Technical Analysis

CVE-2019-19783 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
cyrus1 product(s)
imap
Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.15.html
PATCHhttps://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.html
PATCHhttps://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.15.html
PATCHhttps://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.html
ADVISORYhttps://seclists.org/bugtraq/2019/Dec/38
ADVISORYhttps://security.gentoo.org/glsa/202006-23
ADVISORYhttps://usn.ubuntu.com/4566-1/
ADVISORYhttps://www.debian.org/security/2019/dsa-4590
ADVISORYhttps://seclists.org/bugtraq/2019/Dec/38
ADVISORYhttps://security.gentoo.org/glsa/202006-23
ADVISORYhttps://usn.ubuntu.com/4566-1/
ADVISORYhttps://www.debian.org/security/2019/dsa-4590

All References (16)

→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2DIV4HQ6LG5GPRO4B5Z2NHCZUPBUVVVF/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGOO5UGEBBDPN7B2YXLK7I7L3Y35EBA/
→
https://seclists.org/bugtraq/2019/Dec/38Mailing List · Third Party Advisory
→
https://security.gentoo.org/glsa/202006-23Third Party Advisory
→
https://usn.ubuntu.com/4566-1/Third Party Advisory
→
https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.15.htmlPatch · Release Notes · Vendor Advisory
→
https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.htmlPatch · Release Notes · Vendor Advisory
→
https://www.debian.org/security/2019/dsa-4590Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2DIV4HQ6LG5GPRO4B5Z2NHCZUPBUVVVF/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGOO5UGEBBDPN7B2YXLK7I7L3Y35EBA/
→
https://seclists.org/bugtraq/2019/Dec/38Mailing List · Third Party Advisory
→
https://security.gentoo.org/glsa/202006-23Third Party Advisory
→
https://usn.ubuntu.com/4566-1/Third Party Advisory
→
https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.15.htmlPatch · Release Notes · Vendor Advisory
→
https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.13.htmlPatch · Release Notes · Vendor Advisory

Quick Facts

CVE IDCVE-2019-19783
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-269
CISA KEVNo
Affected4 vendor(s)
PublishedDec 16, 2019

Related CVEs (CWE-269)

CVE-2022-24783
10.0
CVE-2020-27655
10.0
CVE-2021-1388
10.0
CVE-2024-6240
10.0
CVE-2025-0505
10.0
CVE-2018-4310
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-19783 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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