CVE-2025-65082

CGI input manipulation via environment override

Published Dec 5, 2025 · Updated Dec 5, 2025

Improper neutralization in CGI environment construction in Apache HTTP Server 2.4.0 through 2.4.65 allows attackers to alter CGI inputs. Configuration-defined environment variables take precedence over request-derived values that the server calculates for CGI programs, contrary to the documented separation of standard CGI variables. CGI must be enabled and a conflicting variable must be set in configuration; Apache has not published a more specific security consequence.

CVSS severityUnavailable
Unscored
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper neutralization in CGI environment construction in Apache HTTP Server 2.4.0 through 2.4.65 allows attackers to alter CGI inputs. Configuration-defined environment variables take precedence over request-derived values that the server calculates for CGI programs, contrary to the documented separation of standard CGI variables. CGI must be enabled and a conflicting variable must be set in configuration; Apache has not published a more specific security consequence.

The record

CVE
CVE-2025-65082
Published
Dec 5, 2025
Updated
Dec 5, 2025
Vendor
The Apache Software Foundation
Product
Apache HTTP Server
Classifications
CWE-150
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.4.0 <=2.4.65

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Apache Software Foundation · Apache HTTP Serverversion=2.4.0 <=2.4.65

Published CVSS scores

No CVSS assessment is available in this record.

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-150Improper Neutralization of Escape, Meta, or Control Sequences

Public exploit references

No public exploit references are available in this record.

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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