All news with #authentication bypass tag

🔒 Threat actors are actively exploiting a critical authentication bypass in the JobMonster WordPress theme (CVE-2025-5397) that can lead to administrator account takeover under specific conditions. The flaw affects all versions up to 4.8.1 and is caused by the theme's check_login() function trusting external social login data without proper verification. To succeed, attackers typically need social login enabled and knowledge of an admin username or email. The issue is fixed in 4.8.2; immediate mitigations include upgrading, disabling social login, enabling two‑factor authentication, rotating credentials, and reviewing access logs.

🔒 CISA and the NSA, joined by the Australian Cyber Security Centre and the Canadian Centre for Cyber Security, released guidance to harden on-premises and hybrid Microsoft Exchange servers against attacks. The advisory emphasizes stronger authentication, minimized application attack surfaces, robust TLS configurations, and decommissioning unsupported servers after migration to Microsoft 365. It also recommends enabling emergency mitigations and built-in anti-spam and anti-malware protections and restricting administrative access to authorized workstations.

⚠️ CISA has confirmed active exploitation of two vulnerabilities in Dassault Systèmes' DELMIA Apriso: CVE-2025-6205 (critical missing authorization) and CVE-2025-6204 (high-severity code injection). Both flaws were patched by the vendor in early August 2025 and affect Releases 2020 through 2025. Federal agencies must remediate within three weeks under BOD 22-01, and CISA urges all organizations to prioritize vendor mitigations or discontinue use if no fixes exist.

🔔 QNAP has warned that its NetBak PC Agent, a Windows backup utility, may include an affected ASP.NET Core runtime vulnerable to CVE-2025-55315. The flaw resides in the Kestrel ASP.NET Core web server and can allow low-privileged attackers to hijack other users' credentials or bypass front-end security via HTTP request smuggling. QNAP recommends reinstalling the app or manually installing the latest ASP.NET Core Runtime (Hosting Bundle) from the .NET 8.0 downloads to secure systems.

🔐 Passwordless authentication reduces reliance on passwords by using device-bound keys and local verification. The post explains that passwordless is inherently multi-factor: a device factor plus a local secret such as a PIN or biometric. Biometrics and PINs unlock a private key stored on the device and are not transmitted or centralized, reducing theft and replay risks. It also describes protections that make this approach highly phishing-resistant.

⚠ An unauthenticated access vulnerability in the embedded web server of ASKI Energy ALS‑Mini‑S4 and ALS‑Mini‑S8 IP controllers allows remote actors to read and modify device configuration, potentially yielding full control. Tracked as CVE-2025-9574, the issue is a Missing Authentication for Critical Function (CWE‑306) with a CVSS v4 base score of 9.9. ABB reports these products reached end of life in 2022 and will not be patched; operators should remove internet exposure, place devices behind firewalls or secure proxies that enforce authentication and logging, restrict access to whitelisted IPs, monitor for unauthorized access with IDS/IPS, or physically disconnect the Ethernet port if web features are not required.

🔍 This analysis examines CVE-2025-54918, a critical NTLM/LDAP authentication bypass that enables privilege escalation from a standard domain user to SYSTEM on Domain Controllers. The vulnerability chains coercion (PrinterBug-style) with NTLM relay and packet manipulation to evade channel binding and LDAP signing. The post outlines the attack flow, detection indicators such as empty usernames and LOCAL_CALL flags, and mitigations using CrowdStrike Falcon capabilities.

⚠️ TP-Link has disclosed two command injection vulnerabilities affecting Omada gateway devices that allow execution of arbitrary OS commands. One issue, CVE-2025-6542 (CVSS 9.3), can be exploited remotely without authentication; the other, CVE-2025-6541 (CVSS 8.6), requires access to the web management interface. Thirteen models are listed as impacted and TP-Link has released firmware updates to address the flaws; administrators are urged to apply patches and verify configurations after upgrading.

🔒 Microsoft confirmed that Windows updates released on and after August 29, 2025 enforce additional SID checks that can break Kerberos and NTLM authentication on devices with duplicate Security Identifiers (SIDs). Affected systems — including Windows 11 24H2, Windows 11 25H2, and Windows Server 2025 — may experience failed Remote Desktop sessions, SEC_E_NO_CREDENTIALS event errors, and "access denied" messages. The fault commonly arises when images are duplicated without using Sysprep. Microsoft recommends rebuilding impacted machines with supported imaging procedures or obtaining a temporary Group Policy from Support as an interim measure.

⚠️ Siemens has published an advisory for SIMATIC S7-1200 CPU V1/V2 devices describing two high-severity vulnerabilities: an Improper Input Validation flaw (CVE-2011-20001) that can force a controller into a stop/defect state via malformed HTTP traffic, and an Authentication Bypass by Capture-Replay (CVE-2011-20002) that allows replay of engineering commands. CVSS v4 scores are high (up to 8.7); Siemens recommends updating firmware (V2.0.3/V2.0.2) and disabling the web server where possible, while CISA advises network segmentation, firewalling, and avoiding direct Internet exposure.

🔒 A critical authentication bypass in Raisecomm RAX701-GC devices permits SSH sessions without completing user authentication, potentially granting unauthenticated root shell access. The flaw is tracked as CVE-2025-11534 with a CVSS v3.1 score of 9.8 and CVSS v4 score of 9.3, exploitable remotely with low attack complexity. Affected firmware versions include 5.5.27_20190111, 5.5.13_20180720, and 5.5.36_20190709. CISA recommends isolating affected devices from the internet, placing control networks behind firewalls, and using secure remote access methods such as updated VPNs while contacting vendor support.

🛡️ Cisco Talos warns that Microsoft 365 Exchange Online’s Direct Send feature, intended for legacy devices and line‑of‑business appliances, is being abused to bypass standard authentication and content inspection. Attackers are leveraging these unauthenticated SMTP flows in phishing and BEC campaigns by impersonating internal users and embedding obfuscated lures such as QR codes and empty‑body messages. Talos recommends a phased approach — inventorying dependencies, migrating devices to authenticated SMTP or partner connectors, and validating mailflows before enabling RejectDirectSend — to reduce risk without disrupting critical workflows.

🔒 Microsoft warns the October 2025 Windows security updates are causing smart card authentication and certificate failures by switching RSA-based smart card certificates to use KSP instead of CSP. Affected systems may report errors such as "invalid provider type specified" or "CryptAcquireCertificatePrivateKey error" and Event ID 624 in the Smart Card Service log. Microsoft provides a manual workaround: set the DisableCapiOverrideForRSA registry value to 0, back up the registry first, then restart. This impacts Windows 10, Windows 11 and Windows Server releases; the company says the key will be removed in April 2026 and urges customers to work with application vendors to resolve compatibility.

🚨 CISA has added a maximum-severity vulnerability in Adobe Experience Manager (AEM) Forms to its Known Exploited Vulnerabilities Catalog after confirming active exploitation. Tracked as CVE-2025-54253, the flaw is an authentication bypass via Struts DevMode that can result in unauthenticated remote code execution on AEM JEE 6.5.23 and earlier. Adobe released fixes on August 9 after public proof-of-concept code appeared; CISA requires federal agencies to remediate by November 5 and urges all organizations to prioritize patching, apply vendor mitigations, or restrict Internet access to affected AEM Forms deployments.

⚠️ Siemens ProductCERT and CISA report a Missing Authentication for Critical Function vulnerability (CVE-2025-40771) affecting SIMATIC ET 200SP CP modules. The flaw allows an unauthenticated remote actor to access device configuration data and is rated highly severe (CVSS v4 9.3; CVSS v3.1 9.8). Siemens advises updating affected modules to V2.4.24 or later and restricting access to trusted IP addresses; CISA recommends minimizing network exposure, isolating control networks, and using secure remote access methods.

🔒 Siemens TeleControl Server Basic V3.1 contains a critical missing-authentication vulnerability (CVE-2025-40765) that allows unauthenticated remote attackers to obtain user password hashes and perform authenticated database operations. The issue carries a CVSS v3.1 score of 9.8 and a CVSS v4 score of 9.3, with network attack vector and low attack complexity. Siemens advises updating to V3.1.2.3 or later and restricting access to port 8000; CISA emphasizes isolating control networks and minimizing internet exposure. Tenable reported the issue and, to date, CISA has not received reports of public exploitation.

🔒 The article warns that deploying synced passkeys introduces enterprise exposure because they inherit risks tied to cloud accounts and recovery processes. It highlights practical attack vectors — including AiTM-based authentication downgrades and malicious browser extensions — that can bypass or capture passkeys. The author recommends mandatory use of device-bound, hardware-backed authenticators and strict enrollment and recovery controls to preserve phishing-resistant access.

🔒 Claroty Team82 disclosed two critical vulnerabilities (CVE-2023-40151 and CVE-2023-42770) affecting Red Lion Sixnet SixTRAK and VersaTRAK RTUs, both rated 10.0 on the CVSS scale. One flaw is an authentication bypass that accepts unauthenticated TCP messages on port 1594; the other enables remote shell execution via the Sixnet Universal Driver (UDR), allowing commands to run as root. Chaining the issues permits unauthenticated remote root code execution, creating substantial risk to industrial automation. Users are advised to apply vendor patches, enable and correctly configure authentication, and block TCP access to affected devices immediately.

🔒 Oracle issued an alert for CVE-2025-61884, a high-severity (CVSS 7.5) flaw in Oracle E-Business Suite versions 12.2.3 through 12.2.14 that can be exploited remotely over HTTP without authentication. The NIST description warns the defect permits an unauthenticated attacker to compromise Oracle Configurator, potentially exposing or allowing complete access to critical configurable data. Oracle urges administrators to apply the update immediately; it has not reported observed in-the-wild exploitation.

🔒 A critical authentication bypass in the Service Finder Bookings plugin (CVE-2025-5947, CVSS 9.8) allows unauthenticated attackers to sign in as any user, including administrators. The root cause is improper cookie validation in the account-switching function service_finder_switch_back(), which enables privilege escalation. Maintainers released Service Finder version 6.1 on July 17, 2025 to address the issue, and exploitation attempts have been observed since August 1, 2025. Administrators should upgrade immediately and audit sites for unauthorized accounts or unexpected changes.