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CVE-2025-66035 (GCVE-0-2025-66035)

Vulnerability from cvelistv5 – Published: 2025-11-26 22:18 – Updated: 2026-06-02 13:00
VLAI
Title
Angular HTTP Client Has XSRF Token Leakage via Protocol-Relative URLs
Summary
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.16, 20.3.14, and 21.0.1, there is a XSRF token leakage via protocol-relative URLs in angular HTTP clients. The vulnerability is a Credential Leak by App Logic that leads to the unauthorized disclosure of the Cross-Site Request Forgery (XSRF) token to an attacker-controlled domain. Angular's HttpClient has a built-in XSRF protection mechanism that works by checking if a request URL starts with a protocol (http:// or https://) to determine if it is cross-origin. If the URL starts with protocol-relative URL (//), it is incorrectly treated as a same-origin request, and the XSRF token is automatically added to the X-XSRF-TOKEN header. This issue has been patched in versions 19.2.16, 20.3.14, and 21.0.1. A workaround for this issue involves avoiding using protocol-relative URLs (URLs starting with //) in HttpClient requests. All backend communication URLs should be hardcoded as relative paths (starting with a single /) or fully qualified, trusted absolute URLs.
Severity
7.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-28 18:28 UTC
CWE
  • CWE-201 - Insertion of Sensitive Information Into Sent Data
  • CWE-359 - Exposure of Private Personal Information to an Unauthorized Actor
Assigner
References
Impacted products
Vendor Product Version CPE status
angular angular Affected: >= 21.0.0-next.0, < 21.0.1
Affected: >= 20.0.0-next.0, < 20.3.14
Affected: < 19.2.16
guessed Create a notification for this product.
Siemens RUGGEDCOM RST2428P Affected: 0 , < V4.0 (custom)
guessed Create a notification for this product.
Siemens SIDIS Prime Affected: 0 , < V4.0.800 (custom)
guessed Create a notification for this product.
Show details on NVD website
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Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.