CVE-2021-41269

CRITICAL

cron-utils <9.1.2 - RCE

Title source: llm

Description

cron-utils is a Java library to define, parse, validate, migrate crons as well as get human readable descriptions for them. In affected versions A template Injection was identified in cron-utils enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. Versions up to 9.1.2 are susceptible to this vulnerability. Please note, that only projects using the @Cron annotation to validate untrusted Cron expressions are affected. The issue was patched and a new version was released. Please upgrade to version 9.1.6. There are no known workarounds known.

Exploits (3)

nomisec WRITEUP

by dawetmaster · poc

https://github.com/dawetmaster/CVE-2021-41269-cron-utils-vulnerable

View Code ZIP pw:eip

nomisec WRITEUP

by andikahilmy · poc

https://github.com/andikahilmy/CVE-2021-41269-cron-utils-vulnerable

View Code ZIP pw:eip

nomisec WRITEUP

by shoucheng3 · poc

https://github.com/shoucheng3/jmrozanec__cron-utils_CVE-2021-41269_9-1-5

View Code ZIP pw:eip

References (4)

[Patch, Third Party Advisory] https://github.com/jmrozanec/cron-utils/commit/cfd2880f80e62ea74b92fa83474c2aabdb9899da

[Patch, Third Party Advisory] https://github.com/jmrozanec/cron-utils/commit/d6707503ec2f20947f79e38f861dba93b39df9da

[Exploit, Issue Tracking, Third Party Advisory] https://github.com/jmrozanec/cron-utils/issues/461

[Third Party Advisory] https://github.com/jmrozanec/cron-utils/security/advisories/GHSA-p9m8-27x8-rg87

Scores

CVSS v3 10.0

EPSS 0.0188

EPSS Percentile 83.2%

Attack Vector NETWORK

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

Details

CWE

CWE-94

Status published

Products (2)

com.cronutils/cron-utils 0 - 9.1.6Maven

cron-utils_project/cron-utils < 9.1.6

Published Nov 15, 2021

Tracked Since Feb 18, 2026