What is CVE-2021-22958?

CVE-2021-22958 is a critical-severity vulnerability in Concretecms Concrete_cms, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2021-10-07.

How severe is CVE-2021-22958?

Critical severity. CVSS v3 base score is 9.8 out of 10.

SSRF in Concretecms Concrete_cms

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 depend…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.012 (64.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Concretecms Concrete_cms
N/a Https://github.com/concrete5/concrete5 — versions Fixed in 8.5.5

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

support@hackerone.com (Permissions Required, Third Party Advisory, x_refsource_MISC, Issue Tracking)
support@hackerone.com (x_refsource_MISC, Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-22958?: CVE-2021-22958 is a critical-severity vulnerability in Concretecms Concrete_cms, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2021-10-07.
How severe is CVE-2021-22958?: Critical severity. CVSS v3 base score is 9.8 out of 10.