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CVE Record

CVE-2018-1000088: Doorkeeper version 2.1.0 through 4.2.5 contains a Cross Site Scripting (XSS) vulnerability in web view's OA...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2018-1000088 is a stored XSS issue in Doorkeeper’s OAuth web views. A malicious OAuth client name could cause script execution when a user views the OAuth app form or authorization prompt. The sources say fixed releases are 4.2.6 and 4.3.0.

Executive priority

Treat this as a moderate web application security issue. It is not documented as actively exploited in the supplied sources, but OAuth authorization screens are trust-sensitive, and exposed vulnerable versions should be upgraded during the next security maintenance window.

Technical view

Doorkeeper versions 2.1.0 through 4.2.5 did not safely handle the OAuth client name in affected web views, allowing stored XSS. Exploitation requires a victim to follow a link to the affected web view and interact with content that renders the stored client name.

Likely exposure

Exposure is likely limited to applications using Doorkeeper 2.1.0 through 4.2.5 and exposing the affected OAuth app or authorization prompt web views. The bundle does not provide CPEs, CVSS, or broader affected product data.

Exploitation context

The source bundle does not show CISA KEV listing or confirmed active exploitation. It describes user interaction: the victim must be tricked into clicking a link to a web view that renders the stored XSS payload.

Researcher notes

Evidence is limited but consistent: the CVE text identifies stored XSS in Doorkeeper OAuth web views, affected versions 2.1.0 through 4.2.5, user-click exploitation, and fixes in 4.2.6 and 4.3.0. No CVSS, CWE, CPE, or KEV evidence is provided.

Mitigation direction

  • Upgrade Doorkeeper to 4.2.6, 4.3.0, or a later maintained version.
  • Review registered OAuth client names for suspicious script-like content.
  • Restrict who can create or rename OAuth clients.
  • Check the Doorkeeper project guidance before applying compensating controls.
  • Prioritize systems where OAuth consent screens are internet-facing.

Validation and detection

  • Inventory deployed Doorkeeper gem versions across applications.
  • Confirm no application runs Doorkeeper 2.1.0 through 4.2.5.
  • Review OAuth client records for unsafe names or unexpected changes.
  • Test affected web views after upgrade using benign XSS validation strings.
  • Check logs for unusual OAuth client creation or rename activity.
Prepared
Confidence
high
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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