CVE-2021-41269

Unauthenticated remote code injection in cron-utils

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.

Affected

jmrozanec · cron-utils

CVSS v3.1 NVD

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

CVSS v3.1 GITHUB

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

CVSS v2.0 NVD

6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS

4.35% chance of exploitation in the next 30 days, 91st percentile

Published

2021-11-15

Updated

2024-08-04

Proof-of-concept exploits (2)

• jmrozanec/cron-utils/issues/4611210★ · 2025-12-01
• shoucheng3/jmrozanec__cron-utils_CVE-2021-41269_9-1-50★ · 2025-10-24

Security advisories

• jmrozanec/cron-utils/security/advisories/GHSA-p9m8-27x8-rg87
• advisories/GHSA-p9m8-27x8-rg87

References

• CVE Record
• NVD entry

Related

• CVE-2020-26238