What is CVE-2025-59526?

CVE-2025-59526 is a vulnerability in Eladnava Mailgen, classified under Cross-site Scripting. Published 2025-09-22.

Is CVE-2025-59526 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Eladnava Mailgen

CVE-2025-59526

mailgen is a Node.js package that generates responsive HTML e-mails for sending transactional mail. Prior to version 2.0.30, there is an HTML injection vulnerability in plaintext e-mails generated by Mailgen. Projects are affected if the Mailgen.generatePlaintext(email) method is used and given user-generated content. This vulnerability has been patched in version 2.0.30. A workaround involves stripping all HTML tags before passing any content into Mailgen.generatePlaintext(email).

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (34.2th percentile) — read the EPSS interpretation.

Affected products

Eladnava Mailgen — versions < 2.0.30

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-59526?: CVE-2025-59526 is a vulnerability in Eladnava Mailgen, classified under Cross-site Scripting. Published 2025-09-22.
Is CVE-2025-59526 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.