Umbraco-RCE

Umbraco RCE exploit / PoC Umbraco CMS 7.12.4 - Authenticated Remote Code Execution EDB-49488 PacketStorm WLB-2020080012 Usage $ python exploit.py -h usage: exploit.py -h -u USER -p PASS -i URL -c CMD -a ARGS Umbraco authenticated RCE optional arguments: -h, --help show this help message and exit ...

CVE-2019-25137-Version-Research

CVE-2019-25137 Affected Version Research CVE-2019-25137 Overview CVE-2019-25137 is a XSLT injection vulnerability in Umbraco CMS. The vulnerability is present in the XSLT Extensive Stylesheet Language Transformations Visualizer webpage. The vulnerable URI for this webpage is...

CVE-2026-117553

Umbraco CMS before 17.7.2 and 18.2.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to register attacker-controlled OAuth redirect URIs by poisoning the Host header. Attackers send signed-in users authorization links using responsemode=formpost to capture...

CVE-2026-117553 Umbraco CMS before 17.7.2 and 18.2.2 Account Takeover via Host Header Poisoning

Umbraco CMS before 17.7.2 and 18.2.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to register attacker-controlled OAuth redirect URIs by poisoning the Host header. Attackers send signed-in users authorization links using responsemode=formpost to capture...

CVE-2026-117553

Umbraco CMS before 17.7.2 and 18.2.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to register attacker-controlled OAuth redirect URIs by poisoning the Host header. Attackers send signed-in users authorization links using responsemode=formpost to capture...

CVE-2026-117553

Umbraco CMS versions prior to 17.7.2 and 18.2.2 are vulnerable to an authentication bypass via Host header poisoning . An unauthenticated attacker can register malicious OAuth redirect URIs by manipulating the Host header. By sending signed-in users specific authorization links (using response_mo...

EUVD-2026-110831

Umbraco CMS before 17.7.2 and 18.2.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to register attacker-controlled OAuth redirect URIs by poisoning the Host header. Attackers send signed-in users authorization links using responsemode=formpost to capture...

CVE-2026-117553 Umbraco CMS before 17.7.2 and 18.2.2 Account Takeover via Host Header Poisoning

Umbraco CMS before 17.7.2 and 18.2.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to register attacker-controlled OAuth redirect URIs by poisoning the Host header. Attackers send signed-in users authorization links using responsemode=formpost to capture...

Umbraco HQ Umbraco CMS input validation error vulnerability

Umbraco HQ: Versions prior to Umbraco CMS 17.7.2 and from 18.0.0 up to 18.2.2 contain an input validation error vulnerability. This vulnerability arises from Host header pollution, allowing unauthenticated attackers to register OAuth redirect URIs under their control. Once they capture code via...

PT-2026-126412

Umbraco CMS before 17.7.2 and 18.2.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to register attacker-controlled OAuth redirect URIs by poisoning the Host header. Attackers send signed-in users authorization links using response mode=form post to capture...

CVE-2026-111624

Umbraco CMS before 17.7.1 and 18.2.1 contains a missing authorization vulnerability that allows unauthenticated clients to connect to the backoffice PreviewHub and BackofficeHub SignalR hubs. Attackers can complete the SignalR negotiate step and receive refreshed notifications that disclose conte...

CVE-2026-111624 Umbraco CMS before 17.7.1 and 18.2.1 Missing Authorization on SignalR Hubs

Umbraco CMS before 17.7.1 and 18.2.1 contains a missing authorization vulnerability that allows unauthenticated clients to connect to the backoffice PreviewHub and BackofficeHub SignalR hubs. Attackers can complete the SignalR negotiate step and receive refreshed notifications that disclose conte...

CVE-2026-111624

Umbraco CMS before 17.7.1 and 18.2.1 contains a missing authorization vulnerability that allows unauthenticated clients to connect to the backoffice PreviewHub and BackofficeHub SignalR hubs. Attackers can complete the SignalR negotiate step and receive refreshed notifications that disclose conte...

EUVD-2026-103046

Umbraco CMS before 17.7.1 and 18.2.1 contains a missing authorization vulnerability that allows unauthenticated clients to connect to the backoffice PreviewHub and BackofficeHub SignalR hubs. Attackers can complete the SignalR negotiate step and receive refreshed notifications that disclose conte...

CVE-2026-111624 Umbraco CMS before 17.7.1 and 18.2.1 Missing Authorization on SignalR Hubs

Umbraco CMS before 17.7.1 and 18.2.1 contains a missing authorization vulnerability that allows unauthenticated clients to connect to the backoffice PreviewHub and BackofficeHub SignalR hubs. Attackers can complete the SignalR negotiate step and receive refreshed notifications that disclose conte...

CVE-2026-111624 Umbraco CMS before 17.7.1 and 18.2.1 Missing Authorization on SignalR Hubs

Umbraco CMS before 17.7.1 and 18.2.1 contains a missing authorization vulnerability that allows unauthenticated clients to connect to the backoffice PreviewHub and BackofficeHub SignalR hubs. Attackers can complete the SignalR negotiate step and receive refreshed notifications that disclose conte...

CVE-2026-111624

Umbraco CMS versions before 17.7.1 and 18.2.1 are affected by a missing authorization vulnerability in the PreviewHub and BackofficeHub SignalR hubs. Due to this flaw, unauthenticated clients can connect to these hubs and complete the SignalR negotiate step. This allows attackers to receive refre...

PT-2026-116023

Name of the Vulnerable Software and Affected Versions Umbraco CMS versions prior to 17.7.1 Umbraco CMS versions prior to 18.2.1 Description Missing authorization allows unauthenticated clients to connect to the backoffice 'PreviewHub' and 'BackofficeHub' SignalR hubs. By completing the SignalR...

CVE-2026-111624: Missing Authentication for Critical Function

Umbraco CMS before 17.7.1 and 18.2.1 contains a missing authorization vulnerability that allows unauthenticated clients to connect to the backoffice PreviewHub and BackofficeHub SignalR hubs. Attackers can complete the SignalR negotiate step and receive refreshed notifications that disclose conte...

Umbraco HQ Umbraco CMS Authorization Issues Vulnerability

Umbraco HQ: Umbraco CMS versions prior to 17.7.1 and 18.2.1 have authorization-related vulnerabilities. These vulnerabilities stem from a lack of authorization verification. Attackers can complete SignalR negotiation steps and receive refresh notifications, allowing unverified clients to connect ...