CVE-2025-52557

Mail-0 Zero Session Hijacking Via Email

CVSS 8.6 HIGHEPSS 0.4%CWE-1384

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.6EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

21 Jun 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Mail-0's Zero is an open-source email solution. In version 0.8 it's possible for an attacker to craft an email that executes javascript leading to session hijacking due to improper sanitization. This issue has been patched in version 0.81.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Affected products

Mail-0 · Zero

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References

https://github.com/Mail-0/Zero/commit/48d1df65b62c9c57897b72b241081f447140342f https://github.com/Mail-0/Zero/pull/1386 https://github.com/Mail-0/Zero/security/advisories/GHSA-34gh-g567-hq85