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CVE-2017-12843

22
FAUCET Score

CVE-2017-12843 describes a vulnerability in Cyrus IMAP versions prior to 3.0.3, allowing authenticated attackers to write arbitrary files through crafted SYNCAPPLY, SYNCGET, or SYNCRESTORE commands. This medium-severity vulnerability (CVSS 6.5) has a low attack complexity and requires authentication, but can lead to high integrity impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.2CPE matchmatch criteria
cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:*
26CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:26:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/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
3.0

Exploit Intelligence

EPSS Score
1.23%
Probability of exploitation in next 30 days
EPSS Percentile
65.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0123 is in the 80th percentile among its peer group of 21,977 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

Remediation records are not available for this CVE.

References

github.com / cyrusimap/cyrus-imapd/commit/53c4137bd924b954432c6c59da7572c4c5ffa901
Third Party Advisory
github.com / cyrusimap/cyrus-imapd/commit/5edadcfb83bf27107578830801817f9e6d0ad941
Third Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6M32R5QPCCNT57BVH3NPV5WVJFSTDP7Q
cyrusimap.org / imap/download/release-notes/3.0/x/3.0.3.html
Release NotesVendor Advisory