← Vulnerability feed

Vulnerability record · CVE-2020-11977 · published 15 September 2020

CVE-2020-11977: Apache syncope vulnerability

Apache · Syncope

In Apache Syncope 2.1.X releases prior to 2.1.7, when the Flowable extension is enabled, an administrator with workflow entitlements can use Shell Service Tasks to perform malicious operations, including but not limited to file read, file write, and code execution.

7.2 CVSS 3.1 High EPSS 2.9% · top 13.8%
7.2CVSS 3.1 base score, v2 8.5
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

In Apache Syncope 2.1.X releases prior to 2.1.7, when the Flowable extension is enabled, an administrator with workflow entitlements can use Shell Service Tasks to perform malicious operations, including but not limited to file read, file write, and code execution.

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

Affected products

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

References

LinkTags
https://syncope.apache.org/security#CVE-2020-11977:_Remote_Code_Execution_via_Flowable_workflow_definition Vendor Advisory
https://syncope.apache.org/security#CVE-2020-11977:_Remote_Code_Execution_via_Flowable_workflow_definition Vendor Advisory

Track CVE-2020-11977 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

9.8CVE-2026-63071Apache syncope vulnerabilityImproper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements for Implementations can creat…EPSS 0.75%9.8CVE-2026-57308Apache syncope sql injection vulnerabilityImproper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Apache Syncope. An administrator with adequate …EPSS 0.83%9.8CVE-2026-62183Apache syncope improper privilege management vulnerabilityImproper Privilege Management vulnerability in Apache Syncope. When: * the all-Java user workflow adapter is configured, or * the Flowable user workf…EPSS 0.69%9.8CVE-2026-53421Apache syncope vulnerabilityImproper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements can achieve remote code execu…EPSS 1.1%9.8CVE-2026-53405Apache syncope vulnerabilityImproper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements can import arbitrary BPMN pro…EPSS 0.75%9.8CVE-2020-1961Apache syncope injection vulnerabilityVulnerability to Server-Side Template Injection on Mail templates for Apache Syncope 2.0.X releases prior to 2.0.15, 2.1.X releases prior to 2.1.6, e…EPSS 4.8%9.8CVE-2020-1959Apache syncope expression language injection vulnerabilityA Server-Side Template Injection was identified in Apache Syncope prior to 2.1.6 enabling attackers to inject arbitrary Java EL expressions, leading …EPSS 5.0%8.1CVE-2026-62418Apache syncope server-side request forgery (ssrf) vulnerabilityLow-privileged authenticated Server-Side Request Forgery (SSRF) vulnerability in Apache Syncope via Connectors and Resources check. This issue affect…EPSS 0.47%

Source: NIST National Vulnerability Database (record CVE-2020-11977), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.