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CVE-2023-54391 is an authentication-bypass vulnerability in Proxmox Virtual Environment 7.0 through 8.0 affecting libpve-access-control versions before 8.0.4. The API login flow improperly accepts an arbitrary two-factor-authentication challenge value, allowing password verification to be skipped. An unauthenticated remote attacker can consequently authenticate as any existing enabled account that does not have a second factor configured, including the privileged root@pam account.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
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11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An authentication-bypass flaw in Proxmox VE's libpve-access-control component before version 8.0.4. An unauthenticated attacker can provide an arbitrary tfa-challenge value to the access-ticket API login endpoint to bypass password verification and authenticate as enabled accounts that lack configured two-factor authentication, including root@pam.
An authentication-bypass vulnerability in Proxmox VE's libpve-access-control component before version 8.0.4. An unauthenticated attacker can provide an arbitrary tfa-challenge value to the access-ticket API login endpoint, bypass password verification and authenticate as an enabled account without configured second-factor authentication, including root@pam.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.