UpHeron
All vulnerabilities

Servers and applications

CVE-2021-22958

A Server-Side Request Forgery vulnerability was found in concrete5 < 8.5.5 that allowed a decimal notation encoded IP address to bypass the limitations in place for localhost allowing interaction with local services. Impact can vary depending on services exposed.CVSSv2.0 AV:A/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N

Severity
Critical 9.8
Published
7 Oct 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
8.5.5
Sources
NVD

Affected software

SoftwareAffected versions
Concrete CMSServers and applications · cpe:a:concretecms:concrete_cms
  • Every version before 8.5.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-22958
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-22958