Auth bypass in JSON Pattern Validator Project
CVE-2019-19507
In jpv (aka Json Pattern Validator) before 2.1.1, compareCommon() can be bypassed because certain internal attributes can be overwritten via a conflicting name, as demonstrated by 'constructor': {'name':'Array'}. This affects validate(). Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.010 (60.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/manvel-khnkoyan/jpv/issues/6 (Exploit, Third Party Advisory, Issue Tracking)
- www.npmjs.com/package/jpv (Product)
Frequently asked questions
- What is CVE-2019-19507?
- CVE-2019-19507 is a medium-severity vulnerability in JSON Pattern Validator Project, classified under Improper Authentication. CVSS score: 5.3/10. Published 2019-12-02.
- How severe is CVE-2019-19507?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2019-19507 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.