CVE-2021-31316Public exploitNetwork attack vector

Root command execution via injected session identifier

Published May 18, 2021 · Updated Aug 3, 2024

SQL injection in CentOS Web Panel's unprivileged portal allows remote attackers to gain root access through a password-reset request. The password-reset handler incorporates the idsession POST value into a database query, letting injected results reach a root-privileged shell_exec call. The default unauthenticated endpoint on port 2083 is sufficient to execute arbitrary shell commands as root without an account or user interaction.

CVSS severity9.8
Critical
EPSS probability13.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in CentOS Web Panel's unprivileged portal allows remote attackers to gain root access through a password-reset request. The password-reset handler incorporates the idsession POST value into a database query, letting injected results reach a root-privileged shell_exec call. The default unauthenticated endpoint on port 2083 is sufficient to execute arbitrary shell commands as root without an account or user interaction.

The record

CVE
CVE-2021-31316
Published
May 18, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-89, T1059, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 18, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1059Command and Scripting Interpreter
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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