CVE-2023-48003

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-12-26 · updated 2026-06-17
Weakness: CWE-601

Description

An open redirect through HTML injection in user messages in Asp.Net Zero before 12.3.0 allows remote attackers to redirect targeted victims to any URL via the '<meta http-equiv="refresh"' in the WebSocket messages.

Affected products

Aspnetzero Asp.Net Zero: before 12.3.0 — fixed in 12.3.0

How to fix

Upgrade to a fixed version: Aspnetzero Asp.Net Zero 12.3.0. Check the vendor advisory for mitigations.

References

https://docs.unsafe-inline.com/0day/asp.net-zero-v12.3.0-html-injection-leads-to-open-redirect-via-websockets-cve-2023-48003
https://github.com/passtheticket/vulnerability-research/blob/main/aspnetzero_html_injection_via_websockets_messages.md
https://docs.unsafe-inline.com/0day/asp.net-zero-v12.3.0-html-injection-leads-to-open-redirect-via-websockets-cve-2023-48003
https://github.com/passtheticket/vulnerability-research/blob/main/aspnetzero_html_injection_via_websockets_messages.md

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