CVE-2019-20174 json
auth0-lock vulnerable to XSS via unsanitized placeholder property
published 2020-01-31 6 y ago modified 2026-06-17 4 mo ago also GHSA-w2pf-g6r8-pg22 , EUVD-2020-0280
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
Auth0 Lock before 11.21.0 allows XSS when additionalSignUpFields is used with an untrusted placeholder.
Patch / fix
- npm auth0-lock 11.21.0
- auth0 lock 11.21.0
Exploit prediction
0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- auth0.com https://auth0.com/docs/security/bulletins/cve-2019-20174 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | auth0-lock | <11.21.0 |
11.21.0 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/auth0/lock/commit/6c15e5659c21cd814ea119af5c51b61399598dd5
web
-
auth0.com
/docs/security/bulletins/cve-2019-20174
web, exploit, vendor-advisory
-
github.com
/auth0/lock/releases/tag/v11.21.0
web, release-notes, third-party-advisory
-
github.com
/auth0/lock/security/advisories/GHSA-w2pf-g6r8-pg22
web
-
nvd.nist.gov
/vuln/detail/CVE-2019-20174
advisory
Sources
- CVE List CVE-2019-20174
- GitHub Advisory GHSA-w2pf-g6r8-pg22
- NVD CVE-2019-20174
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