Is xss-game.appspot.com safe?
http://xss-game.appspot.com/
Coveragestrong3 of 4 applicable core capabilities
Educational security training platform operated by Google
xss-game.appspot.com is a free, intentionally vulnerable web application that teaches developers how to find and exploit Cross-Site Scripting flaws in a controlled sandbox. The site is hosted on Google infrastructure, carries no commercial CTAs, and is explicitly designed for security education rather than any monetization or data-harvesting purpose.
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Where this site sits
- Dangerous1–20
- High Risk21–44
- Moderate Risk45–69
- Low Risk70–84
- Safe85–100
The score combines saved evidence strength and analysis quality. Coverage is reported separately.
01 · Investigation Brief
Investigation Brief
xss-game.appspot.com is a free, intentionally vulnerable web application that teaches developers how to find and exploit Cross-Site Scripting flaws in a controlled sandbox. The site is hosted on Google infrastructure, carries no commercial CTAs, and is explicitly designed for security education rather than any monetization or data-harvesting purpose.
Evidence supporting legitimacy
the browser threat feed returned no threat warning for the domain.
The site is described as a security game consisting of several levels resembling real-world applications vulnerable to XSS; the visitor’s task is to find the problem and attack the apps in the same way an evil hacker might.
Vision observations confirm the page displays the text “Warning: You are entering the XSS game area” and references Google’s awareness of the importance of these bugs.
Visitor flow and purpose
The page content is limited to educational material about Cross-Site Scripting and a reference to Google’s vulnerability reward program paying up to $7,500.
No commercial CTAs, affiliate links, or data-collection forms are present; the only external links point to Google’s own application-security resources.
Why the score is 95
The score combines saved deterministic evidence with the grounded analysis available for this report. Coverage remains separate so missing sources cannot be mistaken for clean results.
02 · Security Evidence
Security evidence
Antivirus Engines
0/ 91
No detectionsSaved result - stale
No detections across 91 engines
No antivirus engine in this saved scan raised an adverse result. This is one signal, not a guarantee.
- Malicious
- 0
- Suspicious
- 0
- Total
- 91
All 91 engine results
- 0xSI_f33d - unrated - Clean
- Abusix - clean - Clean
- Acronis - clean - Clean
- ADMINUSLabs - clean - Clean
- AILabs (MONITORAPP) - clean - Clean
- AlienVault - clean - Clean
- alphaMountain.ai - clean - Clean
- AlphaSOC - unrated - Clean
- Antiy-AVL - clean - Clean
- ArcSight Threat Intelligence - unrated - Clean
- AutoShun - unrated - Clean
- Bfore.Ai PreCrime - unrated - Clean
- BitDefender - clean - Clean
- Bkav - unrated - Clean
- BlockList - clean - Clean
- Blueliv - clean - Clean
- Certego - clean - Clean
- ChainPatrol - clean - Clean
- Chong Lua Dao - clean - Clean
- CINS Army - clean - Clean
- Cluster25 - unrated - Clean
- CRDF - clean - Clean
- Criminal IP - unrated - Clean
- CSIS Security Group - unrated - Clean
- CTX AI - clean - Clean
- Cyan - unrated - Clean
- Cyble - clean - Clean
- CyRadar - clean - Clean
- desenmascara.me - clean - Clean
- DNS8 - unrated - Clean
- Dr.Web - clean - Clean
- EmergingThreats - clean - Clean
- Emsisoft - clean - Clean
- Ermes - unrated - Clean
- ESET - clean - Clean
- ESTsecurity - clean - Clean
- Forcepoint ThreatSeeker - clean - Clean
- Fortinet - clean - Clean
- Fortra - unrated - Clean
- G-Data - clean - Clean
- GCP Abuse Intelligence - unrated - Clean
- Google Safe Browsing - clean - Clean
- GreenSnow - clean - Clean
- GreyNoise - unrated - Clean
- Gridinsoft - unrated - Clean
- Guardpot - unrated - Clean
- Heimdal Security - clean - Clean
- Hunt.io Intelligence - unrated - Clean
- IPsum - clean - Clean
- Juniper Networks - clean - Clean
- K7AntiVirus - unrated - Clean
- Kaspersky - clean - Clean
- LevelBlue - clean - Clean
- Lionic - clean - Clean
- Lumu - unrated - Clean
- Malwared - clean - Clean
- MalwarePatrol - clean - Clean
- MalwareURL - unrated - Clean
- Mimecast - unrated - Clean
- Netcraft - unrated - Clean
- OpenPhish - clean - Clean
- PhishFort - unrated - Clean
- Phishtank - clean - Clean
- PREBYTES - clean - Clean
- PrecisionSec - unrated - Clean
- Quick Heal - clean - Clean
- Quttera - clean - Clean
- Rising - clean - Clean
- SafeToOpen - unrated - Clean
- Sangfor - clean - Clean
- Sansec eComscan - unrated - Clean
- Scantitan - clean - Clean
- SCUMWARE.org - clean - Clean
- Seclookup - clean - Clean
- Snort IP sample list - unrated - Clean
- SOCRadar - unrated - Clean
- Sophos - clean - Clean
- StopForumSpam - clean - Clean
- Sucuri SiteCheck - clean - Clean
- ThreatHive - clean - Clean
- URLhaus - clean - Clean
- URLQuery - unrated - Clean
- Viettel Threat Intelligence - clean - Clean
- VIPRE - unrated - Clean
- ViriBack - clean - Clean
- VX Vault - clean - Clean
- Webroot - clean - Clean
- Xcitium Verdict Cloud - clean - Clean
- Yandex Safebrowsing - clean - Clean
- ZeroCERT - clean - Clean
- ZeroFox - unrated - Clean
Security Scans
Checked against the browser threat feeds available to this scan — no hit.
What we observed
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Visual context from the captured page
Warning: You are entering the XSS game area At Google, we know very well how important these bugs are.
What the captured page showed
2 observations- 01
Warning: You are entering the XSS game area
- 02
At Google, we know very well how important these bugs are.
03 · Investigation Story
Investigation story
What the site claims
XSS game
What we observed
The page content was captured and checked alongside 91 antivirus results.
What independent research found
1 external finding were saved and compared with the page evidence.
What remains unverified
1 of the 4 applicable core capabilities did not complete, so those gaps remain visible in the coverage ledger.
What kind of site and risk is this?
Threat category
No threat category confirmed
Service and business model
Content
Observed behavior
Evidence behind this classification
- 01the browser threat feed returned no threat warning
- 02Site is an official Google security training game
Web research findings
Independent findings for xss-game.appspot.com, including public complaints, named review sources, registration records, and look-alike-domain evidence. A missing result is shown as unverified, never converted into a clean bill of health.
- XSS gameopen
"This security game consists of several levels resembling real-world applications which are vulnerable to XSS - your task will be to find the problem and attack the apps, similar to what an evil hacker might do."
Reputation Sources
How this domain rates across independent threat-intelligence and blocklist providers.
04 · Domain & Infrastructure
Domain & infrastructure
The plumbing behind the site — who registered it, how it’s encrypted, where it’s hosted, and where it links out. A valid certificate or a calm server doesn’t mean the business is honest — scam sites pass these checks too. Use this to corroborate the verdict, not to overturn it.
Infrastructure map
How the saved page connected to the wider web.
- Domainxss-game.appspot.com
- Redirects toxss-game.appspot.com
- Hosted byGoogle LLC
- Referencesgoogle.com
Contact Verification
Saved contact details can help identify the operator. Their presence supports traceability; it does not prove the business is trustworthy.
- No direct contact email found on the captured page.
Domain & Encryption
Server Reputation
Referenced Domains
Outbound domains this page links to or loads resources from. Each links to its own security scan.
05 · Evidence Ledger
Evidence ledger
- Antiviruspartial
- Browser threat feedcomplete
- Page contentcomplete
- Analysiscomplete
- Visual evidencecomplete
The conclusion is supported by the evidence saved with this report.
Technical threat
unknownMalware, phishing, credential theft and hostile infrastructure.
No confirmed evidence in this dimension.
Operator / customer risk
unknownComplaints, withdrawals, business conduct and commercial traps.
No confirmed evidence in this dimension.
Source coverage and freshness
Status shows whether usable evidence was saved; finding shows what that evidence observed.
| Source | Result | Completion | Finding | Freshness |
|---|---|---|---|---|
| Antivirus | 0 of 91 engines flagged | Limited | No saved finding | stale fallback · Sep 10, 2026 |
| Browser protection | No browser threat-list match | Completed | No adverse finding | Not available |
| Page content | Page fetched · HTTP 200 | Completed | No adverse finding | Not available |
| Visual evidence | 2 visible observations saved with the page capture | Completed | No adverse finding | Not available |
| Independent research | 1 independent finding were saved | Completed | No adverse finding | Not available |
- Antivirus
- Result0 of 91 engines flagged
- CompletionLimited
- FindingNo saved finding
- Freshnessstale fallback · Sep 10, 2026
- Browser protection
- ResultNo browser threat-list match
- CompletionCompleted
- FindingNo adverse finding
- FreshnessNot available
- Page content
- ResultPage fetched · HTTP 200
- CompletionCompleted
- FindingNo adverse finding
- FreshnessNot available
- Visual evidence
- Result2 visible observations saved with the page capture
- CompletionCompleted
- FindingNo adverse finding
- FreshnessNot available
- Independent research
- Result1 independent finding were saved
- CompletionCompleted
- FindingNo adverse finding
- FreshnessNot available
07 · Safety FAQ
Safety FAQ
Common questions, answered directly from the scan data above — so the answers reflect the saved verdict and evidence in this report.
Is xss-game.appspot.com legit and safe?
Is xss-game.appspot.com safe to use?
Could a legitimate site like xss-game.appspot.com still be used in a scam?
Has xss-game.appspot.com been flagged by antivirus engines?
Is xss-game.appspot.com on any phishing or malware blacklists?
How old is the xss-game.appspot.com domain?
Does xss-game.appspot.com have a valid SSL certificate?
Where is xss-game.appspot.com hosted?
How often is the xss-game.appspot.com report updated?
08 · Final Verdict
Final verdict
Educational security training platform operated by Google
xss-game.appspot.com is a free, intentionally vulnerable web application that teaches developers how to find and exploit Cross-Site Scripting flaws in a controlled sandbox. The site is hosted on Google infrastructure, carries no commercial CTAs, and is explicitly designed for security education rather than any monetization or data-harvesting purpose.
09 · Community