Is CVE-2017-16651 in the CISA KEV catalog?

Yes. CVE-2017-16651 is on the CISA Known Exploited Vulnerabilities list, added 2021-11-03.

What is the CVSS severity of CVE-2017-16651?

CVE-2017-16651 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2017-16651?

CVE-2017-16651 has an EPSS score of 36.92% (98th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-16651?

Upgrade roundcube on debian 11 to 1.3.3+dfsg.1-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2017-16651

HIGHCISA KEVEPSS 98th pctl

7.8

CVSS v3

NVD

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.

CWE-552

How to fix

Remediation Available

roundcubeDebian

Fixed in:1.3.3+dfsg.1-1CVE-2017-16651

roundcubeUbuntu

Fixed in:1.2~beta+dfsg.1-0ubuntu1+esm5USN-7200-1

roundcube-coreUbuntu

Fixed in:1.2~beta+dfsg.1-0ubuntu1+esm5USN-7200-1

roundcube-pluginsUbuntu

Fixed in:1.2~beta+dfsg.1-0ubuntu1+esm5USN-7200-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

36.92%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Roundcube Webmail File Disclosure Vulnerability

Roundcube Webmail contains a file disclosure vulnerability caused by insufficient input validation in conjunction with file-based attachment plugins, which are used by default.

Apply updates per vendor instructions.

Remediation due: 2022-05-03

References

Patch1

github.com

Exploit1

packetstormsecurity.com

Vendor Advisory1

roundcube.net

Third-Party Advisory6

Other references1

cisa.gov

Related Vulnerabilities

Other CWE-552 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-17519	High	7.5	98%	KEV	Fix
CVE-2025-11371	High	7.5	92%	KEV	Fix
CVE-2023-50164	Critical	9.8	81%	-	Fix
CVE-2016-3715	Medium	5.5	75%	KEV	Fix
CVE-2020-15175	High	7.4	71%	-	Fix
CVE-2021-39316	High	7.5	67%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-21.