Doorkeeper version 2.1.0 through 4.2.5 contains a Cross Site Scripting (XSS) vulnerability in web view's OAuth app form, user authorization prompt web view that can result in Stored XSS on the OAuth Client's name will cause users interacting with it will execute payload. This attack appear to be exploitable via The victim must be tricked to click an opaque link to the web view that runs the XSS payload. A malicious version virtually indistinguishable from a normal link.. This vulnerability appears to have been fixed in 4.2.6, 4.3.0.
CVE-2018-1000088
This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 62% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 6.1
- EG Score
- 6.1(medium)
- EPSS
- 70.7%
- KEV
- Not listed
Published
March 13, 2018
Last Modified
November 21, 2024
References (8)
- cve@mitrehttps://github.com/doorkeeper-gem/doorkeeper/issues/969
- cve@mitrehttps://github.com/doorkeeper-gem/doorkeeper/pull/970
- cve@mitrehttps://github.com/doorkeeper-gem/doorkeeper/releases/tag/v4.3.0
- cve@mitrehttps://github.com/rubysec/ruby-advisory-db/pull/328/files
- af854a3a-2127-422b-91ae-364da2661108https://github.com/doorkeeper-gem/doorkeeper/issues/969
- af854a3a-2127-422b-91ae-364da2661108https://github.com/doorkeeper-gem/doorkeeper/pull/970
- af854a3a-2127-422b-91ae-364da2661108https://github.com/doorkeeper-gem/doorkeeper/releases/tag/v4.3.0
- af854a3a-2127-422b-91ae-364da2661108https://github.com/rubysec/ruby-advisory-db/pull/328/files
Patch Availability(1)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | ruby-doorkeeper (2.2.1-1ubuntu0.1~esm2) @ xenial | 2026-05-28 | ubuntu |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
RubyGems(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| doorkeeper | 2.1.0 ... 4.2.5 (21 versions) | 4.2.6 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(1)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Data Freshness Timeline
(refreshed 12× in last 7d / 45× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:04 UTCEPSS rescore
- 2026-07-21 16:18 UTCOSV refresh
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- 2026-07-06 02:20 UTCEPSS rescore
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- 2026-06-15 23:43 UTCOSV refresh
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- 2026-05-28 10:34 UTCEG score recompute
- 2026-05-28 10:34 UTCVendor advisory
- 2026-05-27 13:38 UTCEPSS rescore
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Frequently asked(5)
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