GHSA-vh22-6c6h-rm8q
MEDIUMjte's HTML templates containing Javascript template strings are subject to XSS
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
gg.jte:jte☕gg.jte:jte-runtimeReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
Summary
Jte HTML templates with script tags or script attributes that include a Javascript template string (backticks) are subject to XSS.
Details
The javaScriptBlock and javaScriptAttribute methods in the Escape class (source) do not escape backticks, which are used for Javascript template strings. Dollar signs in template strings should also be escaped as well to prevent undesired interpolation.
PoC
- Use the Jte Gradle Plugin with the following code in
src/jte/xss.jte:@param String someMessage <!DOCTYPE html> <html lang="en"> <head> <title>XSS Test</title> <script>window.someVariable = `${someMessage}`;</script> </head> <body> <h1>XSS Test</h1> </body> </html> - Use the following Java code to demonstrate the XSS vulnerability:
final StringOutput output = new StringOutput(); JtexssGenerated.render(new OwaspHtmlTemplateOutput(output), null, "` + alert(`xss`) + `"); renderHtml(output);
Impact
HTML templates rendered by Jte's OwaspHtmlTemplateOutput in versions less than or equal to 3.1.15 with script tags or script attributes that contain Javascript template strings (backticks) are vulnerable.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | gg.jte:jte | all versions | 3.1.16 |
| ☕Maven | gg.jte:jte-runtime | all versions | 3.1.16 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for gg.jte:jte. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update gg.jte:jte to 3.1.16 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-vh22-6c6h-rm8q is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-vh22-6c6h-rm8q is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-vh22-6c6h-rm8q. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-vh22-6c6h-rm8q in your dependencies?
O3 detects GHSA-vh22-6c6h-rm8q across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.