AUGUST 4, 2026
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Case File

CVE-2021-22958

CRITICAL · CVSS 9.8 EPSS 1.23%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-07 · Last synced 2026-08-04

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CVE
CVE-2021-22958
Severity
CRITICAL
CVSS
9.8
EPSS
1.23%

Original NVD 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