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CVE-2018-16736

30
FAUCET Score

CVE-2018-16736 describes a Cross-Site Scripting (XSS) vulnerability found in version 2.1.6 of the rcfilters plugin for Roundcube, specifically through the _whatfilter and _messages parameters in the settings' Filters section. This vulnerability carries a CVSS score of 5.4 (Medium), indicating a low-complexity attack requiring user interaction, which could lead to limited confidentiality and integrity impacts. While there is no evidence of active exploitation or inclusion in the KEV catalog, public exploit code is available via ExploitDB (EDB-45437), though community discussion and media coverage remain minimal.

Impacted Technologies

VendorProductVersion(s)CPE
2.1.6CPE matchmatch criteria
cpe:2.3:a:rcfilters_project:rcfilters:2.1.6:*:*:*:*:roundcube:*:*

CVSS Data

CVSS version used by this source: 3.0

5.4MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.60%
Probability of exploitation in next 30 days
EPSS Percentile
83.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-45437 · Sep 19, 2018
This CVE's current EPSS score of 0.0260 is in the 98th percentile among its peer group of 15,224 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 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 / eagle00789/RC_Filters/issues/19
Third Party Advisory
github.com / roundcube/roundcubemail/issues/6437
Third Party Advisory
exploit-db.com / exploits/45437
ExploitThird Party AdvisoryVDB Entry