Summary #

Invicti detected that a weak nonce value used in CSP declaration.

Impact #

An attacker can carry out a successful Cross-site Scripting attack by predicting a valid nonce by exploiting this weakness.

Remediation #

The application must generate a fresh value for the nonce-value directive at random and independently each time it transmits a policy. The value should be at least 128 bits long and should be generated using a cryptographically secure random number generator.

Classifications #
CWE-330; ISO27001-A.14.2.5; WASC-16; OWASP 2013-A5; OWASP 2017-A6
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