CVE-2021-3127: linuxfoundation nats-server
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-3127DEBIAN-CVE-2021-3127CGA-2pjv-449p-rcwfCGA-59fw-v64c-mfcqCGA-rp25-fc89-c3v5CGA-xxv9-c886-gg48GHSA-62mh-w5cv-p88cBIT-nats-2021-3127GHSA-9r5x-fjv3-q6h4GHSA-j756-f273-xhp4GO-2022-0386
Published 16-03-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-3127 is a high (CVSS 7.5) vulnerability in linuxfoundation nats-server. EPSS estimates a 1.45% chance of exploitation in the next 30 days, higher than 72.9% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
1.45%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 0 · Related 2Timeline
- 16-03-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
NATS Server 2.x before 2.2.0 and JWT library before 2.0.1 have Incorrect Access Control because Import Token bindings are mishandled.
CVSS metrics
7 scores · 6 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NSourcesAll 6 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · WolfiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · GoEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · ChainguardEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
1.45%
Chance of exploitation in the next 30 days
Percentile
73%
Versus all other CVEs
30-day change
0.00 pp
From 1.45% on 19-09-2026
19-09-202619-10-2026
EPSS score1.45%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (advisories.nats.io)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Chainguard2 products
- nats-serverAll versions (No fix recorded)
- nats-server-compatAll versions (No fix recorded)
Wolfi2 products
- nats-serverAll versions (No fix recorded)
- nats-server-compatAll versions (No fix recorded)
Debian1 product
- golang-github-nats-io-jwt< 2.2.0-1
Github.com/nats-io1 product
- jwt≤ 1.2.2 | < 1.2.3-0.20210314221642-a826c77dc9d2
Github.com/nats-io/jwt1 product
- v2< 2.0.1
Github.com/nats-io/nats-server1 product
- v2< 2.2.0
Linuxfoundation1 product
- nats-server≥ 2.0.0, < 2.2.0
Nats1 product
- jwt_library< 2.0.1
Ubuntu1 product
- golang-github-nats-io-jwtAll versions (No fix recorded)
9 vendors · 11 products
References
15 links- advisories.nats.io/CVE/CVE-2021-3127.txtX Refsource MISCREPORTEVIDENCEWEBAdvisoryExploitVendor Advisory
