CVE-2021-3100
The Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.1-13 didn’t mimic the permissions of the JVM being patched, allowing it to escalate privileges.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.1-13 didn’t mimic the permissions of the JVM being patched, allowing it to escalate privileges.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.37% probability · 30th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-250, CWE-269
- Affected
- amazon/log4jhotpatch
- Source
- psirt@paloaltonetworks.com
EPSS 0.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://alas.aws.amazon.com/AL2/ALAS-2021-1732.htmlVendor Advisory
- https://alas.aws.amazon.com/ALAS-2021-1554.htmlVendor Advisory
- https://unit42.paloaltonetworks.com/aws-log4shell-hot-patch-vulnerabilitiesExploit, Third Party Advisory
- https://alas.aws.amazon.com/AL2/ALAS-2021-1732.htmlVendor Advisory
- https://alas.aws.amazon.com/ALAS-2021-1554.htmlVendor Advisory
- https://unit42.paloaltonetworks.com/aws-log4shell-hot-patch-vulnerabilitiesExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.