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Fencer Vulns
high 8.7

CVE-2020-15227 in the critical feed json

Remote Code Execution vulnerability

published 2020-10-01 6 y ago modified 2026-07-08 4 mo ago also GHSA-8gv3-3j7f-wg94 , EUVD-2020-1420

cvss
8.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
34.4%
EPSS 34.4% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known, plus a Nuclei check

Summary

Nette versions before 2.0.19, 2.1.13, 2.2.10, 2.3.14, 2.4.16, 3.0.6 are vulnerable to an code injection attack by passing specially formed parameters to URL that may possibly leading to RCE. Nette is a PHP/Composer MVC Framework.

Patch / fix

  • packagist nette/application 2.0.19, 2.1.13, 2.2.10, 2.3.14, 2.4.16, 3.0.6
  • nette application 2.0.19, 2.1.13, 2.2.10, 2.3.14, 2.4.16, 3.0.6
  • php-nette Ubuntu 18.04 LTS 2.4-20160731-1ubuntu0.1
  • php-nette Ubuntu Pro 16.04 LTS 2.3.8-1ubuntu1+esm1

ubuntu advisories UBUNTU-CVE-2020-15227

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-15227 updated

php-nette: Code injection attack by passing specially formed parameters to URL

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

34.42% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 8.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
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 8.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
packagist nette/application
>=2.2.0, <2.2.10
>=2.3.0, <2.3.14
>=2.4.0, <2.4.16
>=3.0.0, <3.0.6
>=2.0.0, <2.0.19
>=2.1.0, <2.1.13
2.2.10
2.3.14
2.4.16
3.0.6
2.0.19
2.1.13

Affected products

  • nette application

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
  • CWE-94 Improper Control of Generation of Code

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.