Missing Authentication for Critical Function Affecting phpbb/phpbb-core package, versions >=3.3.0, <3.3.17
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PHP-PHPBBPHPBBCORE-17396109
- published22 Jun 2026
- disclosed12 Jun 2026
- creditUnknown
Introduced: 12 Jun 2026
CVE-2026-48611 (opens in a new tab)How to fix?
Upgrade phpbb/phpbb-core to version 3.3.17 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authentication for Critical Function due to improper authentication checks in the OAuth implementation. An attacker can gain unauthorized access by exploiting the lack of proper validation, even when OAuth is not configured or enabled. This is only exploitable if the default installation is used without any custom authentication configuration.