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CVE-2022-41080 is an authenticated server-side request forgery and elevation-of-privilege vulnerability in Microsoft Exchange Server Outlook Web Access (OWA). Attacker-controlled X-OWA-ExplicitLogonUser header values influence ExplicitSignOnAddress and explicit-logon URL rewriting in the OwaProxyRequestHandler.GetTargetBackEndServerUrl and OwaEcpProxyRequestHandler.GetClientUrlForProxy code paths. This allows frontend requests to be proxied to backend Exchange endpoints using the authenticated user's context, including Exchange PowerShell endpoints normally inaccessible remotely. Affected deployments include Exchange Server 2013 CU23, Exchange Server 2016 CU22 and CU23, and Exchange Server 2019 CU11 and CU12 without the applicable November 2022 security updates. The vulnerability forms the entry point for the OWASSRF chain with CVE-2022-41082, enabling remote code execution while bypassing ProxyNotShell URL rewrite mitigations.
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14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An on-premises Microsoft Exchange vulnerability, part of the OWASSRF exploit chain, used by Storm-1175 to gain initial access by exposing Exchange PowerShell via OWA.
A Microsoft Exchange vulnerability referenced as one of the flaws Play ransomware targets to gain remote code execution and initial access.
Described in the article as a critical Microsoft Exchange SSRF vulnerability exploited through OWASSRF to compromise unpatched servers and deploy ransomware. Microsoft reports exploitation by DEV-0671 to deploy Cuba ransomware since at least November 17, 2022, and by the Play ransomware gang since late November 2022. The exploit was shared online. Security updates were released November 8, 2022; organizations are advised to install November 2022 or later Exchange security updates or disable Outlook Web Access until patched.
A Microsoft Exchange Server privilege escalation vulnerability used as part of the OWASSRF exploit chain to bypass ProxyNotShell mitigations and facilitate compromise of Exchange environments.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.