CVE-2018-11627

21

FAUCET Score

CVE-2018-11627 describes a Cross-Site Scripting (XSS) vulnerability in Sinatra versions prior to 2.0.2, specifically affecting the 400 Bad Request page when a parameters parser exception occurs. This vulnerability has a CVSS score of 6.1 (Medium), indicating it can be exploited remotely with low complexity, requiring user interaction, and potentially leading to low impact on confidentiality and integrity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 2.0.2CPE matchmatch criteria	cpe:2.3:a:sinatrarb:sinatra::::::::
		4.6CPE matchmatch criteria	cpe:2.3:a:redhat:cloudforms:4.6:::::::*
		4.7CPE matchmatch criteria	cpe:2.3:a:redhat:cloudforms:4.7:::::::*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/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

3.0

Exploit Intelligence

EPSS Score

2.21%

Probability of exploitation in next 30 days

EPSS Percentile

80.7%

Percentile rank of EPSS score among Peer Group

As of 2026-07-25

Model: v2026.06.15

This CVE's current EPSS score of 0.0221 is in the 91st 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 (83)

github_advisorypatch availablevia nvd_reference

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ansible-runner-0:1.1.2-2.el7ar

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ansible-tower-0:3.3.3-1.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: bubblewrap-0:0.1.7-1.el7

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: cfme-0:5.10.0.33-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: cfme-amazon-smartstate-0:5.10.0.33-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: cfme-appliance-0:5.10.0.33-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: cfme-gemset-0:5.10.0.33-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: dbus-api-service-0:1.0.1-5.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: dumb-init-0:1.2.0-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: erlang-0:19.3.6.7-1.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: google-compute-engine-0:2.0.0-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: google-config-0:2.0.0-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: httpd-configmap-generator-0:0.2.2-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: nginx-1:1.10.2-1.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-cluster-upgrade-0:1.1.8-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-disaster-recovery-0:1.1.2-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-engine-setup-0:1.1.5-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-image-template-0:1.1.8-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-infra-0:1.1.8-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-manageiq-0:1.1.12-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-repositories-0:1.1.2-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-roles-0:1.1.5-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-shutdown-env-0:1.0.0-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-v2v-conversion-host-0:1.6.3-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ovirt-ansible-vm-infra-0:1.1.10-1.el7ev

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: postgresql96-0:9.6.10-1PGDG.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: prince-0:9.0r2-10.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: pyOpenSSL-0:17.3.0-4.el7ost

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-bambou-0:3.0.1-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-colorama-0:0.3.7-2.el7ost

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-crypto-0:2.6.1-16.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-daemon-0:2.1.2-7.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-funcsigs-0:1.0.2-1.el7ost

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-future-0:0.16.0-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-lockfile-1:0.11.0-10.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-meld3-0:0.6.10-1.el7

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-mock-0:2.0.0-1.el7ost

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-pbr-0:3.1.1-2.el7ost

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-pexpect-0:4.6-1.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-psutil-0:5.4.3-2.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-ptyprocess-0:0.5.2-3.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-pylxca-0:2.1.1-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-pysocks-0:1.5.6-3.el7ost

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-requests-0:2.14.2-1.el7ost

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-requests-toolbelt-0:0.8.0-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-tabulate-0:0.8.2-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-urllib3-0:1.21.1-1.2.el7ost

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: python-vspk-0:5.3.2-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: qpid-proton-0:0.19.0-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rabbitmq-server-0:3.7.4-1.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rh-postgresql95-postgresql-pglogical-0:2.1.0-4.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rh-postgresql95-repmgr-0:4.0.6-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: ruby-0:2.4.5-90.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-bcrypt-0:3.1.12-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-ffi-0:1.9.25-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-hamlit-0:2.8.8-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-http_parser.rb-0:0.6.0-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-json-0:2.1.0-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-linux_block_device-0:0.2.1-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-memory_buffer-0:0.1.0-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-nio4r-0:2.3.1-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-nokogiri-0:1.8.2-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-ovirt-engine-sdk4-0:4.2.4-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-pg-0:0.18.4-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-puma-0:3.7.1-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-qpid_proton-0:0.22.0-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-redhat_access_cfme-0:2.0.3-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-redhat_access_lib-0:1.1.4-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-rugged-0:0.27.4-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-sqlite3-0:1.3.13-2.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-unf_ext-0:0.0.7.5-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: rubygem-websocket-driver-0:0.6.5-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: smem-0:1.4-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: supervisor-0:3.1.4-1.el7

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: wmi-0:1.3.14-7.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.10Fixed in: wxGTK3-0:3.0.3-5.el7at

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.9Fixed in: cfme-0:5.9.8.1-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.9Fixed in: cfme-amazon-smartstate-0:5.9.8.1-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.9Fixed in: cfme-appliance-0:5.9.8.1-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.9Fixed in: cfme-gemset-0:5.9.8.1-1.el7cf

redhatpatch availablevia redhat_api

Product: CloudForms Management Engine 5.9Fixed in: dbus-api-service-0:1.0.1-3.2.el7cf

rubygemspatch availablevia ghsa

Product: sinatraFixed in: 2.0.2

Vendor Advisories (2)

rubygemsGHSA-mq35-wqvf-r23cmedium

Sinatra Cross-site Scripting vulnerability

redhatCVE-2018-11627Moderate

rubygem-sinatra: XSS in the 400 Bad Request page

References

access.redhat.com / errata/RHSA-2019:0212

Third Party Advisory

access.redhat.com / errata/RHSA-2019:0315

Third Party Advisory

github.com / sinatra/sinatra/commit/12786867d6faaceaec62c7c2cb5b0e2dc074d71a

PatchThird Party Advisory

github.com / sinatra/sinatra/issues/1428

ExploitThird Party Advisory