CVE-2021-22958

Description

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

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.40%
Vendor Advisory concretecms.org
Affected: n/a https://github.com/concrete5/concrete5
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/863221 issue tracking permissions required third party advisory
https://documentation.concretecms.org/developers/introduction/version-history/855-release-notes release notes vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-22958?
CVE-2021-22958 has been scored as a critical severity vulnerability.
How to fix CVE-2021-22958?
To fix CVE-2021-22958, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22958 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-22958 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22958?
CVE-2021-22958 affects n/a https://github.com/concrete5/concrete5.
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