CVE-2020-14966: kjur jsrsasign
Vulnerability summary
CVE-2020-14966 is a high (CVSS 7.5) vulnerability in kjur jsrsasign. EPSS estimates a 1.13% chance of exploitation in the next 30 days, higher than 65.7% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 22-06-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in the jsrsasign package through 8.0.18 for Node.js. It allows a malleability in ECDSA signatures by not checking overflows in the length of a sequence and '0' characters appended or prepended to an integer. The modified signatures are verified as valid. This could have a security-relevant impact if an application relied on a single canonical signature.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · NpmEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
1.13%
Chance of exploitation in the next 30 days
Percentile
66%
Versus all other CVEs
30-day change
0.00 pp
From 1.13% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundJsrsasign
Maturity: poc
Weaknesses
CWE · root causeAffected systems
3 vendors · 3 products
