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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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              ],
              "url": "https://github.com/angular/angular/security/advisories/GHSA-58c5-g7wp-6w37"
            },
            {
              "name": "https://github.com/angular/angular/commit/0276479e7d0e280e0f8d26fa567d3b7aa97a516f",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/angular/angular/commit/0276479e7d0e280e0f8d26fa567d3b7aa97a516f"
            },
            {
              "name": "https://github.com/angular/angular/commit/05fe6686a97fa0bcd3cf157805b3612033f975bc",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/angular/angular/commit/05fe6686a97fa0bcd3cf157805b3612033f975bc"
            },
            {
              "name": "https://github.com/angular/angular/commit/3240d856d942727372a705252f7c8c115394a41e",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/angular/angular/commit/3240d856d942727372a705252f7c8c115394a41e"
            },
            {
              "name": "https://github.com/angular/angular/releases/tag/19.2.16",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/angular/angular/releases/tag/19.2.16"
            },
            {
              "name": "https://github.com/angular/angular/releases/tag/20.3.14",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/angular/angular/releases/tag/20.3.14"
            },
            {
              "name": "https://github.com/angular/angular/releases/tag/21.0.1",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/angular/angular/releases/tag/21.0.1"
            }
          ],
          "source": {
            "advisory": "GHSA-58c5-g7wp-6w37",
            "discovery": "UNKNOWN"
          },
          "title": "Angular HTTP Client Has XSRF Token Leakage via Protocol-Relative URLs"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2025-66035",
        "datePublished": "2025-11-26T22:18:35.692Z",
        "dateReserved": "2025-11-21T01:08:02.615Z",
        "dateUpdated": "2026-06-02T13:00:29.580Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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.