CVE-2025-59689

Description

Libraesva ESG 4.5 through 5.5.x before 5.5.7 allows command injection via a compressed e-mail attachment. For ESG 5.0 a fix has been released in 5.0.31. For ESG 5.1 a fix has been released in 5.1.20. For ESG 5.2 a fix has been released in 5.2.31. For ESG 5.4 a fix has been released in 5.4.8. For ESG 5.5. a fix has been released in 5.5.7.

CVSS v3.1 Score

6.1

MEDIUM

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

CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild.

Added: Sep 29, 2025 Remediation due: Oct 20, 2025

Weakness Type (CWE)

CWE-77 CWE-77

Affected Products

Vendor	Product	Versions
libraesva	email_security_gateway	4.5 — 5.0.31
libraesva	email_security_gateway	5.1.0 — 5.1.20
libraesva	email_security_gateway	5.2.0 — 5.2.31
libraesva	email_security_gateway	5.3.0 — 5.3.16
libraesva	email_security_gateway	5.4.0 — 5.4.8
libraesva	email_security_gateway	5.5.0 — 5.5.7

References

Advisories & Patches

https://docs.libraesva.com/knowledgebase/security-advisory-command-injection-vulnerability-cve-2025-59689/ https://www.libraesva.com/security-blog/

Other References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-59689

Frequently Asked Questions

What is CVE-2025-59689? +

Libraesva ESG 4.5 through 5.5.x before 5.5.7 allows command injection via a compressed e-mail attachment. For ESG 5.0 a fix has been released in 5.0.31. For ESG 5.1 a fix has been released in 5.1.20. For ESG 5.2 a fix has been released in 5.2.31. For ESG 5.4 a fix has been released in 5.4.8. For ESG 5.5. a fix has been released in 5.5.7. It has a CVSS v3.1 base score of 6.1 (MEDIUM). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2025-59689? +

CVE-2025-59689 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-59689? +

CVE-2025-59689 affects products from libraesva, specifically: email_security_gateway. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59689? +

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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