<spanclass=toggle-dark><svgxmlns="http://www.w3.org/2000/svg"width="20"height="20"viewBox="0 0 24 24"fill="none"stroke="currentcolor"stroke-width="2"stroke-linecap="round"stroke-linejoin="round"class="feather feather-moon"><pathd="M21 12.79A9 9 0 1111.21 3 7 7 0 0021 12.79z"/></svg></span><spanclass=toggle-light><svgxmlns="http://www.w3.org/2000/svg"width="20"height="20"viewBox="0 0 24 24"fill="none"stroke="currentcolor"stroke-width="2"stroke-linecap="round"stroke-linejoin="round"class="feather feather-sun"><circlecx="12"cy="12"r="5"/><linex1="12"y1="1"x2="12"y2="3"/><linex1="12"y1="21"x2="12"y2="23"/><linex1="4.22"y1="4.22"x2="5.64"y2="5.64"/><linex1="18.36"y1="18.36"x2="19.78"y2="19.78"/><linex1="1"y1="12"x2="3"y2="12"/><linex1="21"y1="12"x2="23"y2="12"/><linex1="4.22"y1="19.78"x2="5.64"y2="18.36"/><linex1="18.36"y1="5.64"x2="19.78"y2="4.22"/></svg></span></button><ulclass="navbar-nav social-nav order-3 order-md-5"><liclass=nav-item><aclass=nav-linkhref=https://github.com/mCaptcha><svgxmlns="http://www.w3.org/2000/svg"width="20"height="20"viewBox="0 0 24 24"fill="none"stroke="currentcolor"stroke-width="2"stroke-linecap="round"stroke-linejoin="round"class="feather feather-github"><pathd="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37.0 00-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44.0 0020 4.77 5.07 5.07.0 0019.91 1S18.73.65 16 2.48a13.38 13.38.0 00-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07.0 005 4.77 5.44 5.44.0 003.5 8.55c0 5.42 3.3 6.61 6.44 7A3.37 3.37.0 009 18.13V22"/></svg><spanclass="ms-2 visually-hidden">GitHub</span></a></li></ul><divclass="collapse navbar-collapse order-4 order-md-1"><ulclass="navbar-nav main-nav me-auto order-5 order-md-2"><liclass=nav-item><aclass=nav-linkhref=/about/>About</a></li><liclass=nav-item><aclass=nav-linkhref=/blog/>Blog</a></li><liclass=nav-item><aclass=nav-linkhref=/community/>Community</a></li><liclass=nav-item><aclass=nav-linkhref=/contact/>Contact</a></li><liclass=nav-item><aclass=nav-linkhref=/docs/prologue/introduction/>Docs</a></li></ul><divclass="break order-6 d-md-none"></div><formclass="navbar-form flex-grow-1 order-7 order-md-3"><inputid=userinputclass="form-control is-search"type=searchplaceholder="Search docs..."aria-label="Search docs..."autocomplete=off><divid=suggestionsclass="shadow bg-white rounded"></div></form></div></div></header><divclass="wrap container"role=document><divclass=content><divclass="row flex-xl-nowrap"><navclass="docs-toc d-none d-xl-block col-xl-3"aria-label="Secondary navigation"><divclass=page-links><h3>On this page</h3><navid=TableOfContents><ul><li><ahref=#rules>Rules:</a><ul><li><ahref=#before-you-start>Before you start</a></li><li><ahref=#performing-your-research>Performing your research</a></li><li><ahref=#handling-personally-identifiable-information-pii>Handling personally identifiable information (PII)</a></li><li><ahref=#reporting-your-vulnerability>Reporting your vulnerability</a></li><li><ahref=#legal-safe-harbor>Legal safe harbor:</a></li></ul></li><li><ahref=#scope>Scope:</a><ul><li><ahref=#mcaptchaorg>mcaptcha.org</a></li><li><ahref=#mcaptchaio>mcaptcha.io</a></li></ul></li></ul></nav></div></nav><mainclass="docs-content col-lg-11 col-xl-9"><h1>Security</h1><pclass=lead></p><p>Security is at the heart of mCaptcha. If you find any discrepancies in
our software(see listing on our <ahref=https://github.com/mCaptcha>GitHub</a>,
services available at</p><h2id=rules>Rules:<ahref=#rulesclass=anchoraria-hidden=true>#</a></h2><h3id=before-you-start>Before you start<ahref=#before-you-startclass=anchoraria-hidden=true>#</a></h3><ul><li><p>Check the list of domains that are in scope for the Bug Bounty program
and the list of targets for useful information for getting started.</p></li><li><p>Check the list of bugs that have been classified as ineligible.</p></li><li><p>Check our changelog(on our GitHub repositories) for recently launched features.</p></li><li><p>Never attempt non-technical attacks such as social engineering,
phishing, or physical attacks against our employees, users, or
infrastructure.</p></li></ul><p>When in doubt, contact
me(<ahref=/contributors/aravinth-manivannan/>@realaravinth</a>) at
<ahref=mailto:realaravinth@batsense.net>realaravinth@batense.net</a>.</p><h3id=performing-your-research>Performing your research<ahref=#performing-your-researchclass=anchoraria-hidden=true>#</a></h3><ul><li><p>Do not impact other users with your testing, this includes testing
vulnerabilities with CAPTCHA credentials and account credentials
organizations you do not own. If you are attempting to find an
authorization bypass, you must use accounts you own.</p></li><li><p>The following are never allowed for research. We may
suspend your mCaptcha account for:</p><ul><li><p>Performing distributed denial of service (DDoS) or other volumetric
attacks. Sure, we are a DDos protection company, but with sufficient
resources and motivation, it is possible to take us down. For this
reason, we request you to not hammer us.</p></li><li><p>Spamming content Large-scale vulnerability scanners, scrapers, or
automated tools which produce excessive amounts of traffic.</p><p>Note: We do allow the use of automated tools so long as they do
not produce excessive amounts of traffic. For example, running
one nmap scan against one host is allowed, but sending 65,000
requests in two minutes using Burp Suite Intruder is excessive.</p></li></ul></li><li><p>Researching denial-of-service attacks is allowed only if you follow
these rules:</p><ul><li><p>There are no limits for researching denial of service
vulnerabilities against your own instance of mCaptcha server.</p><p>We strongly recommend/prefer this method for researching
denial of service issues.</p></li><li><p>If you choose to test on mCaptcha proper (i.e.
<ahref=https://mcaptcha.org>https://mcaptcha.org</a> or <ahref=https://mcaptcha.io>https://mcaptcha.io</a>):</p><ul><li>Research must be performed using credentials you own.</li><li>Stop immediately if you believe you have affected the
availability of our services. Don’t worry about demonstrating
the full impact of your vulnerability, our team
will be able to determine the impact.</li></ul></li></ul></li></ul><h3id=handling-personally-identifiable-information-pii>Handling personally identifiable information (PII)<ahref=#handling-personally-identifiable-information-piiclass=anchoraria-hidden=true>#</a></h3><ul><li><p>Personally identifying information (PII) includes:</p><ul><li>legal and/or full names</li><li>names or usernames combined with other identifiers like phone numbers or email addresses</li><li>health or financial information (including insurance information, social security numbers, etc.)</li><li>information about political or religious affiliations</li><li>information about race, ethnicity, sexual orientation, gender, or other identifying information that could be used for discriminatory purposes</li></ul></li><li><p>Do not intentionally access others’ PII. If you suspect a service
provides access to PII, limit queries to your own personal
information.</p></li><li><p>Report the vulnerability immediately and do not attempt to access any
other data. We will assess the scope and impact of the PII exposure.</p></li><li><p>Limit the amount of data returned from services. For SQL injection,
for example, limit the number of rows returned</p></li><li><p>You must delete all your local, stored, or cached copies of data
containing PII as soon as possible. We may ask you to sign a
certificate of deletion and confidentiality agreement regarding the
exact information you accessed. We may ask you for the usernames and
IP addresses used during your testing to assess the impact of the
vulnerability.</p></li></ul><h3id=reporting-your-vulnerability>Reporting your vulnerability<ahref=#reporting-your-vulnerabilityclass=anchoraria-hidden=true>#</a></h3><ul><li><p>Please include written instructions for reproducing the
vulnerability.</p></li><li><p>When reporting vulnerabilities you must keep all information on in our
email correspondence. Do not post information to video-sharing or
please explain the kind of PII you believe is exposed and limit the
amount of PII data included in your bug report. For textual
information and screenshots, please only include redacted data in your
bug report.</p></li><li><p>During the course of an investigation, it may take time to resolve
the issue you have reported. We ask that you refrain from publicly
disclosing details regarding an issue you’ve reported until the fix has
been publicly made available.</p></li></ul><h3id=legal-safe-harbor>Legal safe harbor:<ahref=#legal-safe-harborclass=anchoraria-hidden=true>#</a></h3><p>We currently don’t have any legal policies in place but you can rest
assured that as long as your research adheres to the above rules, your
security research and vulnerability disclosure activities are considered
as “authorized”.</p><p>A detailed policy based on this sentiment is in the works.</p><h2id=scope>Scope:<ahref=#scopeclass=anchoraria-hidden=true>#</a></h2><p>mCaptcha runs a number of services. Only domains listed below are are
eligible for security research. Any mCaptcha-owned domains not listed
below are <em>not</em> in scope and are <em>not</em> covered by our <ahref=./#legal-safe-harbor>legal safe
harbor</a></p><h3id=mcaptchaorg>mcaptcha.org<ahref=#mcaptchaorgclass=anchoraria-hidden=true>#</a></h3><ul><li>mcaptcha.org</li><li>demo.mcaptcha.org</li><li>demo2.mcaptcha.org</li></ul><h3id=mcaptchaio>mcaptcha.io<ahref=#mcaptchaioclass=anchoraria-hidden=true>#</a></h3><ul><li>mcaptcha.io</li></ul><pclass=edit-page><ahref=https://github.com/mCaptcha/website/blob/master/content/security/index.md><svgxmlns="http://www.w3.org/2000/svg"width="16"height="16"viewBox="0 0 24 24"fill="none"stroke="currentcolor"stroke-width="2"stroke-linecap="round"stroke-linejoin="round"class="feather feather-edit-2"><pathd="M17 3a2.828 2.828.0 114 4L7.5 20.5 2 22l1.5-5.5L17 3z"/></svg>Edit this page on GitHub</a></p></main></div></div></div><footerclass="footer text-muted"><divclass=container><divclass=row><divclass="col-lg-8 order-last order-lg-first"><ulclass=list-inline><liclass=list-inline-item>Powered by <ahref=https://gohugo.io/>Hugo</a>, and <ahref=https://getdoks.org/>Doks</a></li></ul></div><divclass="col-lg-8 order-first order-lg-last text-lg-end"><ulclass=list-inline><liclass=list-inline-item><ahref=/about/>About</a></li><liclass=list-inline-item><ahref=/donate>Donate</a></li><liclass=list-inline-item><ahref=/privacy-policy/>Privacy</a></li><liclass=list-inline-item><ahref=/security>Security</a></li><liclass=list-inline-item><ahref=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><liclass=list-inline-item><ahref=/thanks>Thanks</a></li></ul></div></div></div></footer><scriptsrc=/main.min.db67f0caa6a5788b691b9509981d6e5943f4b8d829170a674f468d4b23671ce4017c47a0a22116a8fc2f2de556c8b48f1afecd86707066f2f022c5dd83e8ea3c.jsintegrity="sha512-22fwyqaleItpG5UJmB1uWUP0uNgpFwpnT0aNSyNnHOQBfEegoiEWqPwvLeVWyLSPGv7NhnBwZvLwIsXdg+jqPA=="crossorigin=anonymousdefer></script><scriptsrc=/index.min.6c5c4982ce0ae1f88212e0cba5a6111cc7d16119ec59cb56f8554ea720aa7e5937f6bfb0d7ce366cd2bdebf6e2014c80a27adfb44e9e7175b253e2010156b73e.jsintegrity="sha512-bFxJgs4K4fiCEuDLpaYRHMfRYRnsWctW+FVOpyCqflk39r+w1842bNK96/biAUyAonrftE6ecXWyU+IBAVa3Pg=="crossorigin=anonymousdefer></script></body></html>
