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CVE-2019-11356The CalDAV feature in httpd in Cyrus IMAP 2.5.x through 2.5.12 and 3.0.x through 3.0.9 allows remote attackers to execute arbitrary code…
- 9.8CriticalCVSS base score
- 7.6%Exploitation in 30 daysEPSS · top 5.4% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The CalDAV feature in httpd in Cyrus IMAP 2.5.x through 2.5.12 and 3.0.x through 3.0.9 allows remote attackers to execute arbitrary code via a crafted HTTP PUT operation for an event with a long iCalendar property name.
Timeline
ID reserved
By mitre
- 45 days later
· 45 days later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 7.6% · top 5.4% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
n/a
- affected n/a
References
References10
- https://www.cyrusimap.org/imap/download/release-notes/2.5/index.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cyrusimap.org/imap/download/release-notes/3.0/index.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cyrusimap.org/imap/download/release-notes/2.5/x/2.5.13.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cyrusimap.org/imap/download/release-notes/3.0/x/3.0.10.html (opens in a new tab)x_refsource_MISCx_transferred
- FEDORA-2019-309f559057 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2019-f0435555ac (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- DSA-4458 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 20190609 [SECURITY] [DSA 4458-1] cyrus-imapd security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- RHSA-2019:1771 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- USN-4566-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-3035 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-11356)Record last updated .