CVE-2025-13033 (CVSS 7.5)

Description

A vulnerability was identified in the email parsing library due to improper handling of specially formatted recipient email addresses. An attacker can exploit this flaw by crafting a recipient address that embeds an external address within quotes. This causes the application to misdirect the email to the attacker's external address instead of the intended internal recipient. This could lead to a significant data leak of sensitive information and allow an attacker to bypass security filters and access controls.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-1286 CWE-1286

References

Other References

https://access.redhat.com/errata/RHSA-2026:15979 https://access.redhat.com/errata/RHSA-2026:3751 https://access.redhat.com/security/cve/CVE-2025-13033 https://bugzilla.redhat.com/show_bug.cgi?id=2402179 https://github.com/nodemailer/nodemailer https://github.com/nodemailer/nodemailer/commit/1150d99fba77280df2cfb1885c43df23109a8626 https://github.com/nodemailer/nodemailer/security/advisories/GHSA-mm7p-fcc7-pg87

Frequently Asked Questions

What is CVE-2025-13033? +

A vulnerability was identified in the email parsing library due to improper handling of specially formatted recipient email addresses. An attacker can exploit this flaw by crafting a recipient address that embeds an external address within quotes. This causes the application to misdirect the email to the attacker's external address instead of the intended internal recipient. This could lead to a significant data leak of sensitive information and allow an attacker to bypass security filters and access controls. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-13033? +

CVE-2025-13033 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2025-13033? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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