CVE-2021-37704
Exposed phpinfo() in PhpFastCache
PhpFastCache is a high-performance backend cache system (packagist package phpfastcache/phpfastcache). In versions before 6.1.5, 7.1.2, and 8.0.7 the phpinfo() can be exposed if the /vendor is not protected from public access. This is a rare situation today since the vendor directory is often located outside the web directory or protected via server rule (.htaccess, etc). Only the v6, v7 and v8 will be patched respectively in 8.0.7, 7.1.2, 6.1.5. Older versions such as v5, v4 are not longer supported and will NOT be patched. As a workaround, protect the /vendor directory from public access.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Exposed phpinfo() in PhpFastCache
PhpFastCache is a high-performance backend cache system (packagist package phpfastcache/phpfastcache). In versions before 6.1.5, 7.1.2, and 8.0.7 the phpinfo() can be exposed if the /vendor is not protected from public access. This is a rare situation today since the vendor directory is often located outside the web directory or protected via server rule (.htaccess, etc). Only the v6, v7 and v8 will be patched respectively in 8.0.7, 7.1.2, 6.1.5. Older versions such as v5, v4 are not longer supported and will NOT be patched. As a workaround, protect the /vendor directory from public access.
- Record
CVE-2021-37704- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L - Weakness
- CWE-200
- Updated
- 2026-11-02
EUVDEUVD-2021-1686
PhpFastCache is a high-performance backend cache system (packagist package phpfastcache/phpfastcache). In versions before 6.1.5, 7.1.2, and 8.0.7 the phpinfo() can be exposed if the /vendor is not protected from public access. This is a rare situation today since the vendor directory is often located outside the web directory or protected via server rule (.htaccess, etc). Only the v6, v7 and v8 will be patched respectively in 8.0.7, 7.1.2, 6.1.5. Older versions such as v5, v4 are not longer supported and will NOT be patched. As a workaround, protect the /vendor directory from public access.
- Record
EUVD-2021-1686- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cvh5-p6r6-g2qc
Exposed phpinfo() leadked via documentation files
Impact
The phpinfo() can be exposed if the /vendor is not protected from public access. This is a rare situation today since the vendor directory is often located outside the web directory or protected via server rule (.htaccess, etc).
Patches
Only the v6, v7 and v8 will be patched respectively in 8.0.7, 7.1.2, 6.1.5. Older versions such as v5, v4 are not longer supported and will NOT be patched.
Workarounds
Protect the /vendor directory from public access.
References
The first issue revealing this vulnerability is located here: https://github.com/flextype/flextype/issues/567 V6 fix: https://github.com/PHPSocialNetwork/phpfastcache/pull/815 V7 fix: https://github.com/PHPSocialNetwork/phpfastcache/pull/814 V8 fix: https://github.com/PHPSocialNetwork/phpfastcache/pull/813
For more information
If you have any questions or comments about this advisory:
- Open an issue in our issue tracker
- Email us at [email protected]
- Record
GHSA-cvh5-p6r6-g2qc- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L - Weakness
- CWE-200, CWE-668
- Updated
- 2026-11-02
NVD
PhpFastCache is a high-performance backend cache system (packagist package phpfastcache/phpfastcache). In versions before 6.1.5, 7.1.2, and 8.0.7 the phpinfo() can be exposed if the /vendor is not protected from public access. This is a rare situation today since the vendor directory is often located outside the web directory or protected via server rule (.htaccess, etc). Only the v6, v7 and v8 will be patched respectively in 8.0.7, 7.1.2, 6.1.5. Older versions such as v5, v4 are not longer supported and will NOT be patched. As a workaround, protect the /vendor directory from public access.
- Record
CVE-2021-37704- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L - CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:P/I:N/A:N - Weakness
- CWE-200, CWE-668
- Updated
- 2026-11-02
OSV
PhpFastCache is a high-performance backend cache system (packagist package phpfastcache/phpfastcache). In versions before 6.1.5, 7.1.2, and 8.0.7 the phpinfo() can be exposed if the /vendor is not protected from public access. This is a rare situation today since the vendor directory is often located outside the web directory or protected via server rule (.htaccess, etc). Only the v6, v7 and v8 will be patched respectively in 8.0.7, 7.1.2, 6.1.5. Older versions such as v5, v4 are not longer supported and will NOT be patched. As a workaround, protect the /vendor directory from public access.
- Record
CVE-2021-37704- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-cvh5-p6r6-g2qc
Exposed phpinfo() leadked via documentation files
Impact
The phpinfo() can be exposed if the /vendor is not protected from public access. This is a rare situation today since the vendor directory is often located outside the web directory or protected via server rule (.htaccess, etc).
Patches
Only the v6, v7 and v8 will be patched respectively in 8.0.7, 7.1.2, 6.1.5. Older versions such as v5, v4 are not longer supported and will NOT be patched.
Workarounds
Protect the /vendor directory from public access.
References
The first issue revealing this vulnerability is located here: https://github.com/flextype/flextype/issues/567 V6 fix: https://github.com/PHPSocialNetwork/phpfastcache/pull/815 V7 fix: https://github.com/PHPSocialNetwork/phpfastcache/pull/814 V8 fix: https://github.com/PHPSocialNetwork/phpfastcache/pull/813
For more information
If you have any questions or comments about this advisory:
- Open an issue in our issue tracker
- Email us at [email protected]
- Record
GHSA-cvh5-p6r6-g2qc- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L - Weakness
- CWE-200, CWE-668
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
phpfastcache/phpfastcachePackagist |
before 6.1.5 | 6.1.5 |
phpfastcache/phpfastcachePackagist |
7.0.0 up to 7.1.2 | 7.1.2 |
phpfastcache/phpfastcachePackagist |
8.0.0 up to 8.0.7 | 8.0.7 |
phpfastcache/phpfastcachePackagist |
before 6.1.5, plus listed versions 2.4.22.4.33.0.03.0.13.0.10 Show 45 moreShow less3.0.113.0.123.0.133.0.143.0.153.0.163.0.173.0.183.0.193.0.23.0.203.0.213.0.223.0.233.0.243.0.253.0.263.0.273.0.283.0.33.0.43.0.53.0.63.0.73.0.83.0.93.1.03.1.14.04.0.14.0.104.0.114.0.124.0.134.0.144.0.154.0.164.0.174.0.184.0.24.0.2beta14.0.34.0.3-beta14.0.44.0.5 |
6.1.5 |
phpfastcache/phpfastcachePackagist |
7.0.0 up to 7.1.2, plus listed versions 7.0.17.0.27.0.37.0.47.0.57.1.07.1.1 |
7.1.2 |
phpfastcache/phpfastcachePackagist |
8.0.0 up to 8.0.7, plus listed versions 8.0.18.0.28.0.38.0.48.0.58.0.6 |
8.0.7 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Nuclei | phpfastcache - phpinfo Resource Exposure |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, Nuclei, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-37704 is a medium vulnerability (CVSS 5.4) in Phpfastcache, published August 12, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.89%, the 93rd percentile. Fixed in phpfastcache/phpfastcache 6.1.5.
References
github.com/PHPSocialNetwork/phpfastcache/security/advisories/GHSA-cvh5-p6r6-g2qc
Left out here: 80 versions. The JSON record has them.