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Insecure or unset HTTP headers - X-XSS Protection

Description#

The application uses the X-XSS Protection header considered deprecated. The use of this header may lead to stored XSS vulnerabilities.

Impact#

Increase the chance of exploiting a stored XSS

Recommendation#

Disable the X-XSS Protection filter in the server responses. Instead, define secuirty policies using CSP Header.

Threat#

Unauthorized attacker from the Internet.

Score#

Default score using CVSS 3.1. It may change depending on the context of the vulnerability.

Base#

  • Attack vector: N
  • Attack complexity: H
  • Privileges required: N
  • User interaction: R
  • Scope: U
  • Confidentiality: L
  • Integrity: L
  • Availability: N

Temporal#

  • Exploit code madurity: P
  • Remediation level: O
  • Report confidence: R

Result#

  • Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:R
  • Score:
    • Base: 4.2
    • Temporal: 3.7
  • Severity:
    • Base: Medium
    • Temporal: Low

Requirements#