Is CVE-2021-21311 actively exploited?

CVE-2021-21311 has no public evidence of in-the-wild exploitation as of 2025-10-24.

What is the CVSS score for CVE-2021-21311?

CVE-2021-21311 has a CVSS score of 7.2 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

How do I patch CVE-2021-21311?

Patch guidance is available from adminer security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-21311.

Which products are affected by CVE-2021-21311?

2 products: adminer adminer, debian debian linux.

Fix CVE-2021-21311 - HIGH adminer adminer

Description

Adminer is an open-source database management in a single PHP file. In adminer from version 4.0.0 and before 4.7.9 there is a server-side request forgery vulnerability. Users of Adminer versions bundling all drivers (e.g. `adminer.php`) are affected. This is fixed in version 4.7.9.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-918 · Server-Side Request Forgery

Metadata

Primary Vendor: ADMINER
Published: 2/11/2021
Last Modified: 10/24/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-21311

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary