CVE-2021-41615: Embedthis GoAhead

Critical severity, CVSS 9.8. EPSS: 1.4% chance of exploitation in the next 30 days.

websda.c in GoAhead WebServer 2.1.8 has insufficient nonce entropy because the nonce calculation relies on the hardcoded onceuponatimeinparadise value, which does not follow the secret-data guideline for HTTP Digest Access Authentication in RFC 7616 section 3.3 (or RFC 2617 section 3.2.1). NOTE: 2.1.8 is a version from 2003; however, the affected websda.c code appears in multiple derivative works that may be used in 2021. Recent GoAhead software is unaffected.

Affected products

• Embedthis GoAhead: version 2.1.8 only

Published 2022-08-08. Last modified 2026-06-17.