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CVE-2026-53405

40
FAUCET Score

Improper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements can import arbitrary BPMN process definitions via the REST API and then start the process. When a BPMN process containing a Groovy scriptTask is imported and started, the Groovy script is executed directly on the server, with no sandbox. 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 wrapping Flowable's Groovy scriptTasks with security sandbox.

First published: Jul 20, 2026Last modified: Jul 20, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, <= 3.0.16CPE matchmatch criteria
cpe:2.3:a:apache:syncope:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.7CPE matchmatch criteria
cpe:2.3:a:apache:syncope:*:*:*:*:*:*:*:*
>= 4.1.0, < 4.1.2CPE matchmatch criteria
cpe:2.3:a:apache:syncope:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.34%
Probability of exploitation in next 30 days
EPSS Percentile
27.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0034 is in the 5th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

apachevendor investigatingvia vendor_rss
View patch

Vendor Advisories (1)

apacheapache:www.mail-archive.com/[email protected]/msg11471.htmlLOW

CVE-2026-53405: Apache Syncope: Remote Code Execution via Flowable BPMN Groovy ScriptTask

Jul 20, 2026

References

openwall.com / lists/oss-security/2026/07/20/6
Mailing ListThird Party Advisory
lists.apache.org / thread/vdq0tk6ylffz6trbgbllj9kb1ndzff7k
Mailing ListVendor Advisory