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CVE-2019-19783

23
FAUCET Score

CVE-2019-19783 describes a vulnerability in Cyrus IMAP versions before 2.5.15, 3.0.x before 3.0.13, and 3.1.x through 3.1.8, impacting distributions like Canonical, Cyrus, Debian, and Fedora. A low-privileged user can create mailboxes with administrator privileges by exploiting a folder mishandling issue in the autosieve_createfolder() function via a crafted sieve script. This vulnerability has a CVSS score of 6.5 (Medium), indicating a network-based attack with low complexity, requiring low privileges, and resulting in high integrity impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.5.0, < 2.5.15CPE matchmatch criteria
cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*
>= 3.0.0, < 3.0.13CPE matchmatch criteria
cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*
>= 3.1.0, < 3.1.8CPE matchmatch criteria
cpe:2.3:a:cyrus:imap:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.65%
Probability of exploitation in next 30 days
EPSS Percentile
74.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0165 is in the 87th percentile among its peer group of 21,951 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: cyrus-imapd-0:3.0.7-19.el8
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: cyrus-imapd

Vendor Advisories (1)

redhatCVE-2019-19783Moderate

cyrus-imapd: lmtpd component created mailboxes with administrator privileges if the "fileinto" was used, bypassing ACL checks

Dec 19, 2019

References

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/2DIV4HQ6LG5GPRO4B5Z2NHCZUPBUVVVF
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6IGOO5UGEBBDPN7B2YXLK7I7L3Y35EBA
seclists.org / bugtraq/2019/Dec/38
Mailing ListThird Party Advisory
security.gentoo.org / glsa/202006-23
Third Party Advisory
usn.ubuntu.com / 4566-1
Third Party Advisory
cyrusimap.org / imap/download/release-notes/2.5/x/2.5.15.html
PatchRelease NotesVendor Advisory
cyrusimap.org / imap/download/release-notes/3.0/x/3.0.13.html
PatchRelease NotesVendor Advisory
debian.org / security/2019/dsa-4590
Third Party Advisory