Privilege Escalation in Stalwart Mail Server via RUN_AS_USER Bypass
A privilege escalation vulnerability exists in Stalwart Mail Server prior to version 0.8.0 when configured with the RUN_AS_USER option. If an attacker with admin credentials (or who has compromised an admin account) achieves arbitrary code execution via another vulnerability, they can read arbitrary files as root, bypassing the intended privilege separation enforced by RUN_AS_USER. This exposes sensitive files on the host system to unauthorized access.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Recent activity
1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
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.