CVE-2021-37704Public exploitNetwork attack vector

Configuration disclosure via packaged phpinfo example

Published Aug 12, 2021 · Updated Aug 4, 2024

Information disclosure in affected phpFastCache releases allows remote attackers to read PHP configuration data from an example script. The distributed docs/examples/phpinfo.php file invokes phpinfo(), and Composer archives included that executable documentation file. Exposure requires the application vendor directory to be web-accessible; requesting the example endpoint reveals PHP, server, environment, and configuration details.

CVSS severity5.4
Medium
EPSS probability6.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in affected phpFastCache releases allows remote attackers to read PHP configuration data from an example script. The distributed docs/examples/phpinfo.php file invokes phpinfo(), and Composer archives included that executable documentation file. Exposure requires the application vendor directory to be web-accessible; requesting the example endpoint reveals PHP, server, environment, and configuration details.

The record

CVE
CVE-2021-37704
Published
Aug 12, 2021
Updated
Aug 4, 2024
Vendor
TruCopilot
Product
phpFastCache
Classifications
CWE-200, T1592.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 12, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 6.1.5
  2. Affected versionversion=>= 7.0.0, < 7.1.2
  3. Affected versionversion=>= 8.0.0, < 8.0.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TruCopilot · phpFastCacheversion=< 6.1.5; version=>= 7.0.0, < 7.1.2; version=>= 8.0.0, < 8.0.7

Published CVSS scores

5.4GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1592.004Gather Victim Host Information: Client Configurations

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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