by Kastro
Paper/Archive/CVE-2026-53421

CVE-2026-53421

Apache Software Foundation Apache Syncope — Apache Syncope: Remote Code Execution via Scripted Connector

EPSS 1%CVSS 9.8
critical.is priorityof 100
43
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 66.6.666 × 2013.3No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Improper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements can achieve remote code execution through the connector subsystem by relying on scripted connectors' (REST and SQL) capability to run Groovy scripts. This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1. Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by hardening the Groovy security sandbox.

Affected

ProductAffectedFixed inSource
Apache Syncope3.0.0-M0 – 3.0.16–CNA
Apache Syncope4.0.0-M0 – 4.0.6–CNA
Apache Syncope4.1.0-M0 – 4.1.1–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorylists.apache.org/thread/nmzvz6gb2ldm30wvyk613r8dfrb6r8yxrefopenwall.com/lists/oss-security/2026/07/20/7