SANS Stormcast Monday, December 1st, 2025: More ClickFix; Teams Guest Access; Geoserver XXE Vulnerablity (#)

SANS Stormcast Monday, December 1st, 2025: More ClickFix; Teams Guest Access; Geoserver XXE Vulnerablity (#)

Author: Johannes B. Ullrich December 1, 2025 Duration: 5:42
SANS Stormcast Monday, December 1st, 2025: More ClickFix; Teams Guest Access; Geoserver XXE Vulnerablity Fake adult websites pop realistic Windows Update screen to deliver stealers via ClickFix The latest variant of ClickFix tricks users into copy/pasting commands by displaying a fake blue screen of death. https://www.acronis.com/en/tru/posts/fake-adult-websites-pop-realistic-windows-update-screen-to-deliver-stealers-via-clickfix/ B2B Guest Access Creates an Unprotected Attack Vector Users may be tricked into joining an external Teams workspace as a guest, bypassing protections typically enabled for Teams workspaces. https://www.ontinue.com/resource/blog-microsoft-chat-with-anyone-understanding-phishing-risk/ Geoserver XXE Vulnerability CVE-2025-58360 Geoserver patched an external XML entity (XXE) vulnerability. https://helixguard.ai/blog/CVE-2025-58360 keywords: geoserver; teams; clickfix; xxe; xml

Each weekday morning, Johannes B. Ullrich provides a concise, actionable briefing on the shifting landscape of digital threats and defenses with SANS Internet Storm Center's Daily Network Security News Podcast. Think of it as your first cup of coffee for cybersecurity awareness-a focused, five-minute update that cuts through the noise. The content is shaped by real-time data and analysis from the SANS Internet Storm Center, enriched by questions and experiences shared directly from the community of professionals in the field. You’ll hear about emerging vulnerabilities, active exploits, and practical insights that are both late-breaking and genuinely educational, all delivered in a straightforward, no-frills manner. This podcast serves as a reliable filter, turning the overwhelming flow of security news into a clear, digestible summary that helps you understand current risks and start your day informed. It’s built on a foundation of shared knowledge, where listener contributions actively guide the discussion, making each episode a collaborative reflection of what matters right now in network security.
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