Remote Code Execution in Apache Unomi

published 2020-11-24 5 y ago modified 2026-06-17 4 mo ago also GHSA-xp5j-wj4h-2jq9 , EUVD-2022-1257

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 68.5%; EPSS 68.5% chance of exploitation in 30 days, percentile 99.3%
public exploits: 0; none known, plus a Nuclei check

It is possible to inject malicious OGNL or MVEL scripts into the /context.json public endpoint. This was partially fixed in 1.5.1 but a new attack vector was found. In Apache Unomi version 1.5.2 scripts are now completely filtered from the input. It is highly recommended to upgrade to the latest available version of the 1.5.x release to fix this problem.

Patch / fix

fixed in 2

maven org.apache.unomi:unomi 1.5.2
Apache Software Foundation Apache Unomi 1.5.2

Exploit prediction

68.52% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Nuclei template Apache Unomi <1.5.2 - Remote Code Execution nuclei detection template
advisory.checkmarx.net https://advisory.checkmarx.net/advisory/CX-2020-4284 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	org.apache.unomi:unomi	<1.5.2	1.5.2

Affected products

Apache Software Foundation Apache Unomi

Classification

Weakness

CWE-20 Improper Input Validation
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary