CVE-2017-16651
HighExploitedPublic exploitRoundcube Webmail before 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 allows unauthorized access to arbitrary files on the host's filesystem, including configuration files, as exploited in the wild in November 2017.
Published Nov 9, 2017 · Updated Sep 17, 2026 · Also known as ALPINE-CVE-2017-16651, DEBIAN-CVE-2017-16651, DLA-1193-1, DSA-4030-1, UBUNTU-CVE-2017-16651
Key Facts
Patch immediately- CVE-2017-16651 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Webmail (Roundcube), Debian Linux, roundcubemail (arch) and 1 more product.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 8, 2017. Public exploit code is available.
- EPSS estimates a 46% probability of exploitation in the next 30 days.
- Fixed versions are available, including roundcube 0.7.2-9+deb7u9, roundcube 1.2.3+dfsg.1-4+deb9u1, roundcube 1.2~beta+dfsg.1-0ubuntu1+esm5.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
46%
Higher than 98.7% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2017-16651 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Roundcube Webmail before 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 allows unauthorized access to arbitrary files on the host's filesystem, including configuration files, as exploited in the wild in November 2017. The attacker must be able to authenticate at the target system with a valid username/password as the attack requires an active session. The issue is related to file-based attachment plugins and _task=settings&_action=upload-display&_from=timezone requests.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| Industry KEV feed | Nov 8, 2017 | May 3, 2022 | Not reported |
| CIRCL KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| ENISA EUVD | Nov 3, 2021 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
36 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| WebmailRoundcube | 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5, 1.2.6, 1.3.0 | 1.1.9 |
| Debian LinuxDebian | 7.0, 9.0 | n/a |
| roundcubemailarch | See advisory | 1.3.3-1 |
| roundcubedebian | See advisory | 1.3.3+dfsg.1-1 |
Patched Releases
roundcube
0.7.2-9+deb7u9, 1.2.3+dfsg.1-4+deb9u1, 1.2~beta+dfsg.1-0ubuntu1+esm5, 1.3.3+dfsg.1-1
Webmail
1.1.9
roundcubemail
1.1.10-r0, 1.2.7-r0, 1.3.3-1, 1.4.11-1.3
Timeline
Added to Industry KEV feed
Nov 8, 2017
Publicly disclosed
Nov 9, 2017
Added to CISA KEV
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Sep 17, 2026
Weakness Type
- CWE-552 Files or Directories Accessible to External Parties
References
- advisoryhttps://github.com/roundcube/roundcubemail/releases/tag/1.1.10
- advisoryhttps://github.com/roundcube/roundcubemail/releases/tag/1.2.7
- advisoryhttps://github.com/roundcube/roundcubemail/releases/tag/1.3.3
- advisory[debian-lts-announce] 20171128 [SECURITY] [DLA 1193-1] roundcube security update
- advisoryVulnCheck exploitation report
FAQ
Common Questions.
Roundcube Webmail before 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 allows unauthorized access to arbitrary files on the host's filesystem, including configuration files, as exploited in the wild in November 2017.
Affected: Webmail (Roundcube) versions 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5, 1.2.6, 1.3.0; Debian Linux versions 7.0, 9.0; roundcubemail (arch), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 8, 2017.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.
Public exploit code is available.
Fixed versions are available, including roundcube 0.7.2-9+deb7u9, roundcube 1.2.3+dfsg.1-4+deb9u1, roundcube 1.2~beta+dfsg.1-0ubuntu1+esm5.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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