Apache Unomi log injection

published 2021-05-04 5 y ago modified 2026-06-17 4 mo ago also GHSA-rm7f-mpcj-w4f6 , EUVD-2021-1399

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.3%; EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits: 0; none known

Apache Unomi prior to version 1.5.5 allows CRLF log injection because of the lack of escaping in the log statements.

Patch / fix

fixed in 2 links 1

maven org.apache.unomi:unomi 1.5.5
Apache Software Foundation Apache Unomi 1.5.5

unomi.apache.org/security/cve-2021-31164 advisory

Exploit prediction

2.28% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:P/A:N
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	org.apache.unomi:unomi	<1.5.5	1.5.5

Affected products

Apache Software Foundation Apache Unomi

Classification

Weakness

CWE-93 Improper Neutralization of CRLF Sequences
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

unomi.apache.org /security/cve-2021-31164
web, patch, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2021-31164
advisory

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