CVE-2025-66412
mediumpriority · track · 22EPSS 0.004 · 35 %ileDEEUNLRUUSEPSS · scored 2026-10-26
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 21.0.2, 20.3.15, and 19.2.17, A Stored Cross-Site Scripting (XSS) vulnerability has been identified in the Angular Template Compiler. It occurs because the compiler's internal security schema is incomplete, allowing attackers to bypass Angular's built-in security sanitization. Specifically, the schema fails to classify certain URL-holding attributes (e.g., those that could contain javascript: URLs) as requiring strict URL security, enabling the injection of malicious scripts. This vulnerability is fixed in 21.0.2, 20.3.15, and 19.2.17.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedRUGGEDCOM RST2428P (6GK6242-6PA00)siemens_psirt
Update to V4.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/110002573/ - FixedSIDIS Primesiemens_psirt
Update to V4.0.800 or later version
- FixedSIDIS Primecisa_csaf_ot
Update to V4.0.800 or later version
- FixedRUGGEDCOM RST2428P (6GK6242-6PA00)cisa_csaf_ot
Update to V4.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/110002573/
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.4–8.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (159)
Products and version ranges known to be affected.
advisories (8)
Vendor and ecosystem advisories describing this.
- NCSC-2026-0079Kwetsbaarheden verholpen in Siemens productenNL2026-03-10csaf · ncsc_nlNL
Siemens heeft kwetsbaarheden verholpen in diverse producten als Heliox, Ruggedcom, SICAM, SIDIS en SIMATIC.
- SSA-253495SSA-253495: Multiple Vulnerabilities in SINEC OS before V4.02026-06-02csaf · siemens_psirtDE
SINEC OS before V4.0 contains multiple vulnerabilities. Siemens has released a new version for RUGGEDCOM RST2428P and recommends to update to the latest version.
- SSA-485750SSA-485750: Multiple Vulnerabilities in SIDIS Prime Before V4.0.8002026-03-10csaf · siemens_psirtDE
SIDIS Prime before V4.0.800 is affected by multiple vulnerabilities in the components OpenSSL, SQLite, and several Node.js packages as described below. Siemens has released a new version of SIDIS Prime and recommends to update to the latest version.
- WID-SEC-W-2025-2708Angular: Schwachstelle ermöglicht Cross-Site ScriptingDeutsch2025-12-01csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Angular ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen.
- WID-SEC-W-2026-0778Dell Secure Connect Gateway Policy Manager: Mehrere SchwachstellenDeutsch2026-03-18csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Dell Secure Connect Gateway Policy Manager ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.
- GHSA-v4hv-rgfq-gp49Angular Stored XSS Vulnerability via SVG Animation, SVG URL and MathML Attributes2025-12-02ghsa · osvUS
A **Stored Cross-Site Scripting ([XSS](https://angular.dev/best-practices/security#preventing-cross-site-scripting-xss))** vulnerability has been identified in the **Angular Template Compiler**. It occurs because the compiler's internal security schema is incomplete, allowing attackers to bypass Angular's built-in security sanitization. Specifically, the schema fails to classify certain URL-holding attributes (e.g., those that could contain [`javascript:` URLs](https://developer.mozilla.org/en-US/Web/URI/Reference/Schemes/javascript)) as requiring strict URL security, enabling the injection of malicious scripts. Additionally, a related vulnerability exists involving SVG animation elements (`<animate>`, `<set>`, `<animateMotion>`, `<animateTransform>`). The `attributeName` attribute on these elements was not properly validated, allowing attackers to dynamically target security-sensitive attributes like `href` or `xlink:href` on other elements. By binding `attributeName` to "href" and providing a `javascript:` URL in the `values` or `to` attribute, an attacker could bypass sanitization and execute arbitrary code. Attributes confirmed to be vulnerable include: * SVG-related attributes: (e.g., `xlink:href`), and various MathML attributes (e.g., `math|href`, `annotation|href`). * SVG animation `attributeName` attribute when bound to "href" or "xlink:href". When template binding is used to assign untrusted, user-controlled data to these attributes (e.g., `[attr.xlink:href]="maliciousURL"` or `<animate [attributeName]="'href'" [values]="maliciousURL">`), the compiler incorrectly falls back to a non-sanitizing context or fails to block the dangerous attribute assignment. This allows an attacker to inject a `javascript:URL` payload. Upon user interaction (like a click) on the element, or automatically in the case of animations, the malicious JavaScript executes in the context of the application's origin. ### Impact When exploited, this vulnerability allows an attacker to execute arbitrary code within the context of the vulnerable application's domain. This enables: * **Session Hijacking:** Stealing session cookies and authentication tokens. * **Data Exfiltration:** Capturing and transmitting sensitive user data. * **Unauthorized Actions:** Performing actions on behalf of the user. ### Patches - 19.2.17 - 20.3.15 - 21.0.2 ### Attack Preconditions * The victim's Angular application must render data derived from **untrusted input** (e.g., from a database or API) and bind it to one of the unsanitized URL attributes or the `attributeName` of an SVG animation element. * The victim must perform a **user interaction** (e.g., clicking) on the compromised element for the stored script to execute, or the animation must trigger the execution. ### Workarounds If you cannot upgrade, you can workaround the issue by ensuring that any data bound to the vulnerable attributes is never sourced from untrusted user input (e.g., database, API response, URL parameters). * **Avoid Affected Template Bindings:** Specifically avoid using template bindings (e.g., `[attr.xlink:href]="maliciousURL"`) to assign untrusted data to the vulnerable SVG/MathML attributes. * **Avoid Dynamic `attributeName` on SVG Animations:** Do not bind untrusted data to the `attributeName` attribute of SVG animation elements (`<animate>`, `<set>`, etc.). * **Enable [Content Security Policy (CSP)](https://angular.dev/best-practices/security#content-security-policy):** Configure a robust CSP header that disallows `javascript:` URLs.
- ICSA-26-071-03Siemens SIDIS Prime2026-03-10icsa · cisa_csaf_otUS
SIDIS Prime before V4.0.800 is affected by multiple vulnerabilities in the components OpenSSL, SQLite, and several Node.js packages as described below. Siemens has released a new version of SIDIS Prime and recommends to update to the latest version.
- ICSA-26-188-05Siemens SINEC OS2026-06-02icsa · cisa_csaf_otUS
SINEC OS before V4.0 contains multiple vulnerabilities. Siemens has released a new version for RUGGEDCOM RST2428P and recommends to update to the latest version.
also known as (4)
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sources
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references (9)
External citations — patches, advisories, analysis.
- https://github.com/angular/angular/commit/1c6b0704fb63d051fab8acff84d076abfbc4893acnnvd
- https://github.com/angular/angular/releasesPatchcnnvd
- https://github.com/angular/angular/security/advisories/GHSA-v4hv-rgfq-gp49cnnvd
- https://github.com/angular/angular/commit/1c6b0704fb63d051fab8acff84d076abfbc4893aenisa_euvd
- https://github.com/angular/angular/security/advisories/GHSA-v4hv-rgfq-gp49enisa_euvd
- https://cert-portal.siemens.com/productcert/html/ssa-253495.htmlnvd
- https://cert-portal.siemens.com/productcert/html/ssa-485750.htmlnvd
- https://github.com/angular/angular/commit/1c6b0704fb63d051fab8acff84d076abfbc4893aPatchnvd
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