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Vulnerability record · CVE-2022-23944 · published 25 January 2022

CVE-2022-23944: Apache ShenYu plugin API missing authentication

Apache · Shenyu

Apache ShenYu 2.4.0 and 2.4.1 expose the /plugin API without requiring authentication, a missing authorization and missing authentication flaw. Because the endpoint is reachable over the network with no credentials, it matters for any deployment of the affected versions.

9.1 CVSS 3.1 Critical EPSS 79% · top 0.4% CWE-862 · Missing authorizationCWE-306 · Missing authentication for critical function
9.1CVSS 3.1 base score, v2 6.4
79%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

User can access /plugin api without authentication. This issue affected Apache ShenYu 2.4.0 and 2.4.1.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 18 September 2026. Confidence: high.

critical priorityCVSS 9.1 with network reachability, no authentication and no user interaction, plus a very high EPSS probability, makes this an urgent exposure for affected ShenYu deployments.

What it is

Apache ShenYu 2.4.0 and 2.4.1 expose the /plugin API without requiring authentication, a missing authorization and missing authentication flaw. Because the endpoint is reachable over the network with no credentials, it matters for any deployment of the affected versions.

Impact

An unauthenticated attacker can reach the /plugin API and act with the privileges the endpoint grants, affecting confidentiality and integrity of the gateway configuration. The CVSS vector shows no availability impact.

Attack surface

Reached over the network via HTTP against the /plugin API path; the CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates no authentication and no user interaction are required.

Exploitation

Not listed in CISA KEV and no ransomware usage is documented; EPSS is very high at 0.79007 (percentile 0.99576), and references include a patch advisory but no public exploit tag.

What to do

  • Upgrade Apache ShenYu past 2.4.1 to a release containing the fix referenced in the patch advisory
  • If upgrade is not immediate, block external access to the /plugin API at the reverse proxy or gateway
  • Restrict ShenYu admin and plugin endpoints to trusted management networks only
  • Audit gateway configuration and plugin settings for unauthorized changes made before remediation

Detection

  • Monitor access logs for requests to /plugin paths from unauthenticated or unexpected source IPs
  • Alert on /plugin API calls originating outside the management network
  • Review ShenYu configuration change history for plugin modifications without a corresponding authenticated session

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2022/01/25/15 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2022/01/25/5 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2022/01/26/2 Mailing ListPatchThird Party Advisory
https://lists.apache.org/thread/dbrjnnlrf80dr0f92k5r2ysfvf1kr67y Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2022/01/25/15 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2022/01/25/5 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2022/01/26/2 Mailing ListPatchThird Party Advisory
https://lists.apache.org/thread/dbrjnnlrf80dr0f92k5r2ysfvf1kr67y Mailing ListVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-23944), CISA KEV, FIRST EPSS (scores of 2026-09-24). This page is refreshed as NVD updates the record.