SUSE-SU-2025:4481-1 Security update for golang-github-prometheus-alertmanager

This update for golang-github-prometheus-alertmanager fixes the following issues: - Update to version 0.28.1 jscPED-13285: Improved performance of inhibition rules when using Equal labels. Improve the documentation on escaping in UTF-8 matchers. Update alertmanagerconfighash metric help to docume...

Poly Video - Sensitive Data Might Be Written to Log File

In limited scenarios, sensitive data might be written to the log file if an admin uses Microsoft Teams Admin Center TAC to make device configuration changes. The affected log file is visible only to users with admin credentials. This is limited to Microsoft TAC and does not affect configuration...

Fake Microsoft Teams and Google Meet Downloads Spread Oyster Backdoor

The Oyster backdoor also known as Broomstick is targeting the financial world, using malicious search ads for PuTTY, Teams, and Google Meet...

Silver Fox Uses Fake Microsoft Teams Installer to Spread ValleyRAT Malware in China

The threat actor known as Silver Fox has been spotted orchestrating a false flag operation to mimic a Russian threat group in attacks targeting organizations in China. The search engine optimization SEO poisoning campaign leverages Microsoft Teams lures to trick unsuspecting users into downloadin...

Microsoft Teams Flaw in Guest Chat Exposes Users to Malware Attacks

New research from Ontinue exposes a major security flaw in Microsoft Teams B2B Guest Access. Learn how attackers bypass all Defender for Office 365 protections with a single invite...

GO-2025-4129 Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL in github.com/mattermost/mattermost-server

Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL in github.com/mattermost/mattermost-server...

Researchers Detail Tuoni C2's Role in an Attempted 2025 Real-Estate Cyber Intrusion

Cybersecurity researchers have disclosed details of a cyber attack targeting a major U.S.-based real-estate company that involved the use of a nascent command-and-control C2 and red teaming framework known as Tuoni. "The campaign leveraged the emerging Tuoni C2 framework, a relatively new,...

CVE-2025-55073

Mattermost versions 10.11.x = 10.11.3, 10.5.x = 10.5.11, 10.12.x = 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL...

GHSA-FF85-QW3H-G9VP Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL

Mattermost versions 10.11.x = 10.11.3, 10.5.x = 10.5.11, 10.12.x = 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL...

Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL

Mattermost versions 10.11.x = 10.11.3, 10.5.x = 10.5.11, 10.12.x = 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the MSTeams plugin OAuth flow. An attacker can modify arbitrary posts by sending a crafted OAuth redirect URL. Remediation Upgrade...

CVE-2025-55073

Mattermost versions 10.11.x = 10.11.3, 10.5.x = 10.5.11, 10.12.x = 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL...

EUVD-2025-186555

Mattermost versions 10.11.x = 10.11.3, 10.5.x = 10.5.11, 10.12.x = 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL...

Microsoft Teams Flaws Allowed Attackers to Fake Identities, Rewrite Chats

Microsoft Teams vulnerabilities let attackers impersonate users, edit chat history, and spoof calls before Microsoft issued security fixes in late 2025...

Microsoft Teams Bugs Let Attackers Impersonate Colleagues and Edit Messages Unnoticed

Cybersecurity researchers have disclosed details of four security flaws in Microsoft Teams that could have exposed users to serious impersonation and social engineering attacks. The vulnerabilities "allowed attackers to manipulate conversations, impersonate colleagues, and exploit notifications,"...

SUSE-SU-2025:3817-1 Security update 5.1.1 for Multi-Linux Manager Client Tools

This update fixes the following issues: golang-github-prometheus-alertmanager: - Update to version 0.28.1 jscPED-13285: Improved performance of inhibition rules when using Equal labels. Improve the documentation on escaping in UTF-8 matchers. Update alertmanagerconfighash metric help to document...

Security update 5.1.1 for Multi-Linux Manager Client Tools

This update fixes the following issues: golang-github-prometheus-alertmanager: Update to version 0.28.1 jscPED-13285: Improved performance of inhibition rules when using Equal labels. Improve the documentation on escaping in UTF-8 matchers. Update alertmanagerconfighash metric help to document th...

PT-2025-46948

Name of the Vulnerable Software and Affected Versions Mattermost versions 10.5.x through 10.5.11 Mattermost versions 10.11.x through 10.11.3 Mattermost versions 10.12.x through 10.12.0 Description The Mattermost application does not properly validate the relationship between a post being updated...

ThreatsDay Bulletin: MS Teams Hack, MFA Hijacking, $2B Crypto Heist, Apple Siri Probe & More

Cyber threats are evolving faster than ever. Attackers now combine social engineering, AI-driven manipulation, and cloud exploitation to breach targets once considered secure. From communication platforms to connected devices, every system that enhances convenience also expands the attack surface...

Fake Teams Installers Dropping Oyster Backdoor (aka Broomstick)

Hackers are using fake Microsoft Teams installers found in search results and ads to deploy the Oyster backdoor. Learn how to protect your PC from this remote-access threat...