Improper Verification of Cryptographic Signature Affecting yeswiki/yeswiki package, versions >=4.6.2, <4.6.6
Threat Intelligence
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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Test your applications- Snyk IDSNYK-PHP-YESWIKIYESWIKI-17913448
- published9 Jul 2026
- disclosed9 Jul 2026
- creditUnknown
Introduced: 9 Jul 2026
CVE-2026-52767 (opens in a new tab)How to fix?
Upgrade yeswiki/yeswiki to version 4.6.6 or higher.
Overview
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature in the verifySignature process due to improper verification of cryptographic signatures when handling the return value of openssl_verify. An attacker can gain unauthorized access and perform create, update, or delete operations on entries by sending specially crafted POST requests with manipulated signature parameters, exploiting the loose boolean check to bypass signature validation.