CVE-2021-38587Network attack vector

Unspecified impact via temporary-file race condition

Published Aug 11, 2021 · Updated Aug 4, 2024

Race condition in scripts/fix-cpanel-perl in cPanel before 96.0.13 allows attackers to cause unspecified impact during temporary-file creation. The public record identifies only temporary-file creation in the script; the file name, creation primitive, competing operation, and attacker-controlled input are undisclosed. The required access path and concrete consequence are also undisclosed, so exposure cannot be narrowed beyond installations before 96.0.13.

CVSS severity7.5
High
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in scripts/fix-cpanel-perl in cPanel before 96.0.13 allows attackers to cause unspecified impact during temporary-file creation. The public record identifies only temporary-file creation in the script; the file name, creation primitive, competing operation, and attacker-controlled input are undisclosed. The required access path and concrete consequence are also undisclosed, so exposure cannot be narrowed beyond installations before 96.0.13.

The record

CVE
CVE-2021-38587
Published
Aug 11, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5.0NVDAV:N/AC:L/Au:N/C:N/I:P/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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