Session Hijacking Vulnerability in Mail-0's Zero Email Solution
CVE-2025-52557

8.6HIGH

Key Information:

Vendor

Mail-0

Status
Zero
Vendor
CVE Published:
21 June 2025

What is CVE-2025-52557?

Mail-0's Zero is an open-source email solution that features an unaddressed vulnerability in version 0.8, allowing attackers to exploit improper input sanitization. By crafting specially designed emails, attackers can execute JavaScript, leading to unauthorized session access. This vulnerability poses a significant risk to user sessions and has been resolved in version 0.81. Users are strongly advised to upgrade to the latest version to ensure the security of their email communications.

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Deploy the Patch

Affected Version(s)

Zero = 0.8

References

https://github.com/Mail-0/Zero/security/advisories/GHSA-3...
x_refsource_CONFIRM
https://github.com/Mail-0/Zero/pull/1386
x_refsource_MISC
https://github.com/Mail-0/Zero/commit/48d1df65b62c9c57897...
x_refsource_MISC

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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