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Fencer Intel
critical 9.8

CVE-2020-13942 in the critical feed json

Remote Code Execution in Apache Unomi

published 5y ago modified 4mo 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

Summary

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

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

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Exploit prediction

68.52% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-09).

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 Intel 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.