VulWall Team February 18, 2026 5 min read

Outdated AngularJS Library Allows Fake Content to Be Shown to Your Users

Your website uses an old version of AngularJS (a JavaScript framework) that has a known security flaw. Because of this flaw, an attacker could bypass a built-in safety filter and display images or content from unauthorized sources on your pages — a technique known as content spoofing. The bigger concern here is that AngularJS itself is no longer maintained by its creators, meaning this flaw will never receive an official fix.

OWASP A08 Effort: large Exploitable
cve angularjs sanitization svg content-spoofing eol frontend javascript ngSanitize

Business Impact And Actions

medium urgency

Business Impact

The direct risk is that an attacker could make your site display misleading or unwanted images, which could damage your brand's credibility and erode customer trust. More importantly, running software that is no longer maintained (end-of-life) is a red flag in most compliance frameworks — it can trigger findings in security audits, affect your ability to obtain cyber insurance, and leave you exposed to future vulnerabilities with no patch available.

What To Do

  1. Ask your developer to confirm whether your application actively uses the ngSanitize module with SVG support enabled — if not, your exposure is lower, but the underlying end-of-life risk remains.
  2. Plan a migration away from AngularJS to a modern, actively maintained framework such as Angular (v2+), React, or Vue. This is the only permanent fix, as no official patches will ever be released for AngularJS.
  3. If a full migration is not immediately feasible, ask your developer to disable SVG support in the $sanitizeProvider configuration as a short-term workaround to reduce exposure.
  4. Raise this finding with your compliance or legal team if you are subject to data protection regulations — running end-of-life software may need to be documented as an accepted risk.

AngularJS ngSanitize SVG <image> Image Source Restriction Bypass (CVE-2025-2336)

medium severity

Vulnerability Explanation

The $sanitize service in AngularJS's ngSanitize module fails to correctly identify SVG <image> elements as image elements when SVG support is enabled via $sanitizeProvider.enableSvg(true). As a result, the image source allowlist configured via $compileProvider.imgSrcSanitizationTrustedUrlList() is not applied to the href and xlink:href attributes of SVG <image> elements. An attacker who can supply HTML input to any component that uses $sanitize (including the ngBindHtml directive and the linky filter) can embed images from arbitrary, unconfigured domains, bypassing the application's content restrictions. This enables content spoofing and can also degrade application performance via large or slow-loading external images.

Root Cause

The $sanitize service contains defective element-detection logic: it checks for HTML <img> elements but does not recognise SVG <image> elements as equivalent image nodes. This means the URL sanitization branch is never reached for SVG images, leaving href and xlink:href attributes unsanitized regardless of the configured trusted URL list.

Technical Impact

An attacker can bypass configured image source restrictions to inject images from arbitrary domains into pages rendered by the application. This enables content spoofing (visual defacement of page content under the trusted domain), potential phishing-style UI manipulation, and application performance degradation via large or slow-loading external images. Confidentiality is not impacted; there is no code execution or data exfiltration vector.

Severity Justification

CVSS v3.1 score of 4.8 (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L). Attack complexity is high — exploitation requires SVG support to be explicitly enabled and attacker-controlled HTML input to reach $sanitize. Impact is limited to integrity (content spoofing) and minor availability (performance). No confidentiality impact.

Affected Components

  • angular-sanitize >= 1.3.1 and <= 1.8.3 (all versions up to and including 1.8.3)

Remediation Steps

  1. Determine your actual exposure: check whether your application calls $sanitizeProvider.enableSvg(true) AND passes attacker-controlled HTML to $sanitize, ngBindHtml, or the linky filter. If SVG support is not enabled, the bypass is not reachable.
  2. Short-term workaround — disable SVG support: if SVG rendering via ngSanitize is not a required feature, remove or do not call $sanitizeProvider.enableSvg(true) in your module config. This closes the bypass without a framework change.
  3. Short-term workaround — restrict attacker input: ensure that any HTML passed to $sanitize, ngBindHtml, or linky is either fully trusted (authored by your team) or stripped of SVG markup before reaching the sanitizer.
  4. Long-term fix — migrate away from AngularJS: AngularJS is end-of-life and will receive no further security patches. Plan a migration to Angular (v2+), React, Vue, or another actively maintained framework. Use Angular's ngUpgrade / @angular/upgrade module for an incremental hybrid migration if a full rewrite is not feasible.
  5. If migration is not immediately possible and commercial support is required, HeroDevs Never-Ending Support (NES) has released patched versions (v1.9.9 and v1.5.25) that address this CVE.

Verification Steps

  1. Search your codebase for $sanitizeProvider.enableSvg(true) — if absent, SVG support is disabled and the bypass is not reachable in your application.
  2. If SVG support is enabled, test by passing an SVG <image href="https://external-domain.example/img.png"> payload through your application's HTML input paths and verify whether the image from the disallowed domain is rendered.
  3. After disabling SVG support or completing migration, repeat the above test and confirm the SVG image element is stripped or the external image is blocked.
  4. Use the HeroDevs proof-of-concept on CodePen (https://codepen.io/herodevs/pen/bNGYaXx) to validate the bypass behaviour before and after your fix.

Best Practices

  • Never pass attacker-controlled HTML directly to $sanitize, ngBindHtml, or linky without additional server-side validation.
  • Maintain a software inventory of all third-party JavaScript libraries and flag any that have reached end-of-life status for prioritised replacement.
  • When configuring image source allowlists, verify that all image element types (including SVG variants) are covered by your sanitization rules.
  • Adopt a modern, actively maintained frontend framework with a published security policy and regular patch cadence.

References

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