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CVE-2018-3769

21
FAUCET Score

CVE-2018-3769 describes a Cross-Site Scripting (XSS) vulnerability in the ruby-grape gem, specifically exploitable via the "format" parameter. With a CVSS score of 6.1 (Medium), this vulnerability can be exploited remotely with low attack complexity, requiring user interaction to achieve partial compromise of confidentiality and integrity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.0.3CPE matchmatch criteria
cpe:2.3:a:ruby-grape:grape:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.43%
Probability of exploitation in next 30 days
EPSS Percentile
70.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0143 is in the 83rd percentile among its peer group of 26,219 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: grapeFixed in: 1.1.0

Vendor Advisories (1)

rubygemsGHSA-f599-5m7p-hcpfmedium

grape subject to Cross-site Scripting

Aug 13, 2018

References

github.com / ruby-grape/grape/commit/6876b71efc7b03f7ce1be3f075eaa4e7e6de19af
PatchThird Party Advisory
github.com / ruby-grape/grape/issues/1762
ExploitIssue TrackingThird Party Advisory
github.com / ruby-grape/grape/pull/1763
Third Party Advisory