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Konstantin :C_H:

kpwn@infosec.exchange

<p>I&#39;m a hacker and mainly post about web security.</p><p>By profession, I am a pentester and team leader <span class="h-card" translate="no"><a href="https://infosec.exchange/@usdAG" class="u-url mention">@<span>usdAG</span></a></span>.</p><p>I like to explain and understand things and I am convinced that the two go hand in hand.<br />So my posts are mostly of an educational nature.</p><p>Lately, I spend most of my free time developing CVE Crowd.</p><p>⎯⎯⎯⎯⎯⎯</p><p>Recent topics:<br /><a href="https://infosec.exchange/tags/CveCrowd" class="mention hashtag" rel="tag">#<span>CveCrowd</span></a>, <a href="https://infosec.exchange/tags/Phishing" class="mention hashtag" rel="tag">#<span>Phishing</span></a>, <a href="https://infosec.exchange/tags/CVSS" class="mention hashtag" rel="tag">#<sp

Posts

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    I&#39;ve finally replaced the old-school CAPTCHA required to sign up on https://cvecrowd.com with an open-source, privacy preserving, accessible, and globally compliant alternative: ALTCHA It relies on proof of work and I am super hyped to see whether it will prevent bots from signing up. I&#39;ll keep you updated :)

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    Finally a perfect solve again :ablobcatnodfast: I solved the daily #CluesBySam, May 27th 2026 (Medium), in less than 9 minutes 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 https://cluesbysam.com

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    Perfect solve streak: 2 🎉 I solved the daily #CluesBySam, May 28th 2026 (Tricky), in less than 13 minutes 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 https://cluesbysam.com

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    Perfect streak gone. But I&amp;#39;m still happy with today’s result, given the advanced difficulty 😊 I solved the daily #CluesBySam, May 29th 2026 (Tricky), in less than 8 minutes 🟩🟩🟩🟨 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 https://cluesbysam.com

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    This one was cumbersome. Had an early error… This always tempts me to use hints because a perfect solve isn‘t possible anymore. I solved the daily #CluesBySam, May 30th 2026 (Hard), in less than 14 minutes 🟩🟩🟩🟩 🟩🟨🟩🟩 🟠🟩🟩🟡 🟩🟨🟩🟩 🟩🟠🟩🟩 https://cluesbysam.com

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    Damn! Close enough. I solved the daily #CluesBySam, May 31st 2026 (Hard), in less than 13 minutes 🟨🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 https://cluesbysam.com

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    One reason to look forward to mondays. Easy Clues by Sam puzzles. I solved the daily #CluesBySam, Jun 1st 2026 (Easy), in 05:23 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 https://cluesbysam.com

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    Perfect streak: 2 😊 I solved the daily #CluesBySam, Jun 2nd 2026 (Medium), in 04:42 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 🟩🟩🟩🟩 https://cluesbysam.com

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    Anyone else having the issue that avatars on https://cvecrowd.com are not loading on a mobile device?

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    Apparently #Safari on #iOS applies img-src directives of the content security policy to *object tags* that load images like so: &amp;lt;object type=&amp;quot;image/png&amp;quot; data=&amp;quot;https://media.infosec.exchange/infosec.exchange/accounts/avatars/109/551/708/143/302/638/original/8f107909c923fd55.png&amp;quot;&amp;gt; This was the reason, why https://cvecrowd.com did not display avatars on iOS devices: I was using object tags and the object-src directive. Fixed it by adding an img-sr...