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CVE-2020-11975 Apache Unomi

Affected softwareApache Unomi
Severity9.8 Critical CVSS 3.1 2 scores
Fixed in1.5.4
WeaknessImproper input validation (CWE-20)
Published5 Jun 2020
Updated17 Jun 2026

Description

Apache Unomi allows conditions to use OGNL scripting which offers the possibility to call static Java classes from the JDK that could execute code with the permission level of the running Java process.

Exploitation status

Exploited

Real-world exploitation reported by VulnCheck KEV. CISA has not confirmed it.

  • CISA KEV not listed
  • VulnCheck KEV listed Exploitation reported in the wild. 1 citation · 1 exploit · earliest 2021-04-12.
  • CISA Vulnrichment no assessment published
  • Indexed PoC 2 indexed Published artifacts you can open, in GitHub PoC, Nuclei; first seen 2020-11-24.
  • EPSS 31% chance in 30 days A model's forecast, not a report of exploitation. Higher than 98% of all scored CVEs.

VulnCheck KEV

Exploitation evidence from VulnCheck Known Exploited Vulnerabilities (VulnCheck KEV), used under VulnCheck's community terms. View CVE-2020-11975 in VulnCheck (free account).

EvidenceSourceDetailDate
Reported exploitation unit42.paloaltonetworks.com /network-attack-trends-winter-2020 2021-04-12
Exploit reference VulnCheck XDB 49057f538100 Exploit type: initial-access 2020-11-24
IndexArtifactStarsFirst seen
GitHub PoC CVE-2020-11975 CVE-2020-13942 6 2020-11-24
Nuclei Apache Unomi - Remote Code Execution

Waratek protection

Mitigation candidate

A kind of vulnerability Waratek's rules address, with exploit code published or exploitation reported. No rule exists and none is planned yet. The decision below says what we found to build a rule from.

  • Protection none
  • Action unverified
  • Review automated Inferred
  • Record active
Decided by The affected package being open source on Maven, so the fix can be read
Finding This CVE affects an open-source Java library published on Maven Central (Maven packages: org.apache.unomi:unomi), so it is squarely in ARMR's territory and the source needed to understand the defect is public. That makes it a candidate for an ARMR patch rule. No rule exists and none is scheduled: the diff between the affected and fixed versions has not been read, and a closer look may find no hook point ARMR can act on.

CVSS

9.8 CRITICAL v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H NVD Primary published
CVSS 2.0 10.0 none AV:N/AC:L/Au:N/C:C/I:C/A:C NVD Primary

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.unomi:unomi 0 1.5.4 unbounded

Products and versions

2 products, 2 version entries
SourceVendorProductSchemeAffected versions
nvd apache unomi generic < 1.5.1
osv org.apache.unomi unomi generic < 1.5.4

References

URLTags
https://lists.apache.org/thread.html/r01021bc4b25c1e98812efca0b07f0e078a6281bd52f7c3817a429d95@%3Ccommits.unomi.apache.org%3E WEB
https://lists.apache.org/thread.html/r79672c25e0ef9bb4b9148376281200a8e61c6d5ef5bb705e9a363460@%3Ccommits.unomi.apache.org%3E WEB
http://unomi.apache.org/security/cve-2020-11975.txt WEB
https://lists.apache.org/thread.html/r01021bc4b25c1e98812efca0b07f0e078a6281bd52f7c3817a429d95%40%3Ccommits.unomi.apache.org%3E
https://lists.apache.org/thread.html/r79672c25e0ef9bb4b9148376281200a8e61c6d5ef5bb705e9a363460%40%3Ccommits.unomi.apache.org%3E

Timeline

Published2020-06-05By the CVE Program.
VulnCheck KEV: earliest evidence2021-04-12Date of the oldest evidence of exploitation in VulnCheck KEV's record. VulnCheck does not publish the date it listed the CVE.
NVD record modified2026-06-17NVD's own last-modified date for this record.