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Vulnerability record · CVE-2021-37704 · published 12 August 2021

CVE-2021-37704: Phpfastcache information exposure vulnerability

Phpfastcache · 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.

4.3 CVSS 3.1 Medium EPSS 6.1% · top 6.8% CWE-200 · Information exposureCWE-668 · Exposure of resource to wrong sphere
4.3CVSS 3.1 base score, v2 4.0
6.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
16References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/PHPSocialNetwork/phpfastcache/blob/master/CHANGELOG.md#807 Release NotesThird Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/commit/41a77d0d8f126dbd6fbedcd9e6a82e86cdaafa51 PatchThird Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/pull/813 PatchThird Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/pull/814 Third Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/pull/815 Third Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/security/advisories/GHSA-cvh5-p6r6-g2qc Third Party Advisory
https://github.com/flextype/flextype/issues/567 ExploitIssue TrackingThird Party Advisory
https://packagist.org/packages/phpfastcache/phpfastcache ProductThird Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/blob/master/CHANGELOG.md#807 Release NotesThird Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/commit/41a77d0d8f126dbd6fbedcd9e6a82e86cdaafa51 PatchThird Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/pull/813 PatchThird Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/pull/814 Third Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/pull/815 Third Party Advisory
https://github.com/PHPSocialNetwork/phpfastcache/security/advisories/GHSA-cvh5-p6r6-g2qc Third Party Advisory
https://github.com/flextype/flextype/issues/567 ExploitIssue TrackingThird Party Advisory
https://packagist.org/packages/phpfastcache/phpfastcache ProductThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-37704), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.