A target URL is the specific web address that a request, link, redirect, or security scan is directed at, in other words, the destination you intend a browser, tool, or user to reach. The phrase shows up in web development, marketing analytics, and security testing, and while the core idea is consistent, the reason it matters shifts with the context. This post explains the term plainly and then focuses on where it carries security weight.
The plain definition
A URL, or Uniform Resource Locator, is the address of a resource on the web. A target URL is simply the URL that something is pointing to as its intended destination. Break a URL into parts and the anatomy looks like this:
https://app.example.com/reports/2025?view=summary#top
| | | | |
scheme host path query fragment
- scheme (
https) is the protocol. - host (
app.example.com) is the server. - path (
/reports/2025) is the resource on that server. - query (
view=summary) passes parameters. - fragment (
top) points to a location within the page.
When you say "target URL," you usually mean this whole string as the destination of some action: the href a link opens, the address a form submits to, the endpoint an API call hits, or the site a scanner is told to examine.
Target URL in everyday web development
In a hyperlink, the target URL is the value of the href attribute, the place the link takes you. (Note the unrelated target attribute, which controls whether the link opens in a new tab, not where it goes.) In a redirect, the target URL is where the server or client sends the browser next. In an API integration, it is the endpoint you configure a client to call.
Getting the target URL exactly right is a correctness issue first. A wrong host, a missing path segment, or an http where you needed https produces broken links or failed requests. But small mistakes here can also become security problems.
Where target URLs become a security concern
Three security-relevant situations turn on the target URL.
Open redirects. If your application takes a target URL from user input and redirects to it without validation, an attacker can craft a link on your trusted domain that bounces users to a malicious site. Users see your domain in the initial link and trust it, which makes the redirect an effective phishing aid. The fix is to validate redirect targets against an allowlist rather than accepting arbitrary URLs.
Server-side request forgery. When a server fetches a target URL supplied by the user, an attacker may point that URL at internal systems the server can reach but the attacker cannot, such as cloud metadata endpoints or internal admin panels. This class of bug is significant enough to have its own name; see SSRF meaning for the full explanation and defenses.
Phishing and look-alike destinations. A link's visible text can say one thing while its target URL points somewhere else entirely. Attackers exploit this to make malicious destinations look legitimate. Always inspect the actual target URL, by hovering or long-pressing, before trusting a link, and be suspicious of shorteners that hide the real destination.
Target URL in security scanning
In dynamic application security testing, the target URL is the address you tell the scanner to test. A DAST tool starts from one or more target URLs, then crawls the application, following links and forms to discover reachable pages and endpoints, and probes each for issues like injection, misconfiguration, and authentication weaknesses.
Getting the target URL right here is consequential in both directions:
- Scope too narrow and the scanner never reaches important parts of the app, giving false confidence.
- Scope too broad or wrong and you might test a system you are not authorized to test, which can be both a legal and an operational problem.
Practical guidance for scanning targets:
- Use the exact base URL of the environment you mean to test, typically staging or a dedicated test instance, not production unless you have explicit authorization and a maintenance window.
- Include authentication so the scanner reaches pages behind login, since much of an app's risk lives there.
- Confirm you own or are authorized to test every host in scope. A target URL you are not permitted to scan is not a valid target, full stop.
A quick mental checklist
Whenever you handle a target URL, ask:
- Is it the destination I actually intend? Right scheme, host, and path.
- Does it come from user input? If so, validate it before redirecting to or fetching it.
- Am I authorized to send traffic there? Especially for scans and automated requests.
- Does the visible link match the real destination? For anything a person will click.
Those four questions cover the correctness and the security dimensions of the term in one pass.
FAQ
What does target URL mean?
A target URL is the web address that a request, link, redirect, or scan is directed at, meaning the intended destination. It identifies exactly which resource on which server the action should reach.
Is the target URL the same as the href in a link?
In an HTML link, the target URL is the value of the href attribute, the destination the link opens. Do not confuse it with the separate target attribute, which controls whether the link opens in a new tab or the same one, not where it points.
Why does the target URL matter for security?
If a target URL comes from user input and is used to redirect or to make a server-side request without validation, it can enable open redirects or server-side request forgery. In security scanning, the target URL defines what gets tested, and testing a URL you are not authorized to hit is a real problem.
What is the target URL in a DAST scan?
It is the base address you configure the scanner to start from. The tool crawls outward from that URL to discover pages and endpoints and then tests them. Choosing the correct, authorized target URL determines both coverage and whether the scan stays within scope.