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Microsoft reveals Chinese state-backed hacker groups, including Linen Typhoon, Violet Typhoon, and Storm-2603, are exploiting SharePoint flaws, breaching over 100 organisations. Discover threat actors, their tactics and Microsoft's urgent security guidance.
Microsoft has formally tied the exploitation of security flaws in internet-facing SharePoint Server instances to two Chinese hacking groups called Linen Typhoon and Violet Typhoon as early as July 7, 2025, corroborating earlier reports. The tech giant said it also observed a third China-based threat actor, which it tracks as Storm-2603, weaponizing the flaws as well to obtain initial access to
About Remote Code Execution – Microsoft SharePoint Server “ToolShell” (CVE-2025-53770) vulnerability. SharePoint is a web application developed by Microsoft for corporate intranet portals, document management, and collaborative work. A flaw in the deserialization mechanism of an on-premises SharePoint Server instance allows remote unauthenticated attackers to execute arbitrary code. 👾 On July 18, Eye Security researchers […]
### Summary Deactivated users that had either enrolled via OAuth/SAML or had their account connected to an OAuth/SAML account can still partially access authentik even if their account is deactivated. They end up in a half-authenticated state where they cannot access the API but crucially they can authorize applications if they know the URL of the application. ### Patches authentik 2025.4.4 and 2025.6.4 fix this issue. ### Workarounds Adding an expression policy to the user login stage on the respective authentication flow with the expression of ```py return request.context["pending_user"].is_active ``` This expression will only activate the user login stage when the user is active. ### For more information If you have any questions or comments about this advisory: - Email us at [security@goauthentik.io](mailto:security@goauthentik.io).
### Summary A Denial of Service (DoS) vulnerability exists in Kyverno due to improper handling of JMESPath variable substitutions. Attackers with permissions to create or update Kyverno policies can craft expressions using the `{{@}}` variable combined with a pipe and an invalid JMESPath function (e.g., `{{@ | non_existent_function }}`). This leads to a `nil` value being substituted into the policy structure. Subsequent processing by internal functions, specifically `getValueAsStringMap`, which expect string values, results in a panic due to a type assertion failure (`interface {} is nil, not string`). This crashes Kyverno worker threads in the admission controller (and can lead to full admission controller unavailability in Enforce mode) and causes continuous crashes of the reports controller pod, leading to service degradation or unavailability." ### Details The vulnerability lies in the `getValueAsStringMap` function within `pkg/engine/wildcards/wildcards.go` (specifically around ...
The World Leaks group accessed and released data from the company's Customer Solution Center, which is separated from customer and partner systems and stores primarily "synthetic" datasets used for demos and testing, Dell said.
A tech startup is using personal data stolen by infostealer malware that it has found on the dark web, and then selling access to that data.
The acquisition gives the British cybersecurity solutions provider more insights into encrypted network traffic and additional decryption capabilities.
To be truly resilient in the ever-growing threat landscape, organizations need to balance protection with preparation.
Hackers are exploiting critical SharePoint flaws (CVE-2025-53770/53771) to breach global targets, including governments and corporations. Microsoft urges immediate action. Learn about the active attacks and how to protect your network from credential theft and backdoors.