Cross-site scripting in Swagger-UI

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2019-17495: 5.73% estimated exploitation activity in the next 30 days; percentile 93.06 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

A Cascading Style Sheets (CSS) injection vulnerability in Swagger UI before 3.23.11 allows attackers to use the Relative Path Overwrite (RPO) technique to perform CSS-based input field value exfiltration, such as exfiltration of a CSRF token value. In other words, this product intentionally allows the embedding of untrusted JSON data from remote servers, but it was not previously known that <style@import within the JSON data was a functional attack method.

Published by the source

15 Oct 2019, 19:27 UTC

Last modified by the source

26 Aug 2024, 16:00 UTC

Source last checked

26 Oct 2026, 12:31 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-c427-hjc3-wrfw

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-c427-hjc3-wrfw

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# Patch Next advisory brief: CVE-2019-17495

Advisory: Cross-site scripting in Swagger-UI
IDs: CVE-2019-17495, GHSA-c427-hjc3-wrfw
Record: https://patchnext.com/advisories/cve-2019-17495 (revision 3, source checked 26 Oct 2026, 12:31 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: io.springfox:springfox-swagger-ui 2.10.0; org.webjars:swagger-ui 3.23.11; org.webjars.npm:swagger-ui 3.23.11; swagger-ui 3.23.11. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven io.springfox:springfox-swagger-ui: affected < 2.10.0; fixed in 2.10.0
- Maven org.webjars:swagger-ui: affected < 3.23.11; fixed in 3.23.11
- Maven org.webjars.npm:swagger-ui: affected < 3.23.11; fixed in 3.23.11
- npm swagger-ui: affected < 3.23.11; fixed in 3.23.11

## Suggested inspection (read-only)
- Maven io.springfox:springfox-swagger-ui: check the installed version with your package manager.
- Maven org.webjars:swagger-ui: check the installed version with your package manager.
- Maven org.webjars.npm:swagger-ui: check the installed version with your package manager.
- `npm ls swagger-ui --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on io.springfox:springfox-swagger-ui, org.webjars:swagger-ui, org.webjars.npm:swagger-ui, swagger-ui.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-c427-hjc3-wrfw (OSV record GHSA-c427-hjc3-wrfw lists affected ranges: npm swagger-ui >=0 =0 =0 =0 <2.10.0 (fixed))
- Verified: https://github.com/advisories/GHSA-c427-hjc3-wrfw (GitHub-reviewed advisory GHSA-c427-hjc3-wrfw lists affected ranges: npm swagger-ui >=0 =0 =0 =0 <2.10.0)

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