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ExploitedNot in CISA KEV yetFix available

CVE-2021-37580

Exploitation confirmed. First attested on 2023-10-14 by GCVE · kevintel, GCVE · shadowserver.

  • Published2021-11-16
  • WeaknessCWE-287

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A flaw was found in Apache ShenYu Admin. The incorrect use of JWT in ShenyuAdminBootstrap allows an attacker to bypass authentication. This issue affected Apache ShenYu 2.3.0 and 2.4.0

Timeline

dates in UTC
  1. 2021-11-1610:15CVE publishedNVD
  2. 2023-10-1414:57Listed as exploited by GCVEGCVE
  3. 2023-10-1414:57Exploitation first reportedGCVE

Observed activity

isMalicious corpus · updated 2026-11-03 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-37580?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-37580?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Apache shenyu
BranchAffectedFixed in
2.3= 2.3.0no fix published
2.4= 2.4.0no fix published
shenyu-admin
BranchAffectedFixed in
2.x≥ 2.3.0, < 2.4.12.4.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
7 repositories, unverifiedrabbitsafe/CVE-2021-37580fengwenhua/CVE-2021-37580Osyanina/westone-CVE-2021-37580-scannerZororoZ/CVE-2021-37580Liang2580/CVE-2021-37580
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-11-16
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-vpfp-5gwq-g533

Frequently asked questions

What is CVE-2021-37580?

A flaw was found in Apache ShenYu Admin. The incorrect use of JWT in ShenyuAdminBootstrap allows an attacker to bypass authentication. This issue affected Apache ShenYu 2.3.0 and 2.4.0

Is CVE-2021-37580 actively exploited?

Active exploitation of CVE-2021-37580 has not been confirmed. Its EPSS score was 42.1% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-37580?

CVE-2021-37580 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record