TI-2025-24481 Aliases CVE-2025-34404 GHSA-xgq2-qc35-hwwp

MailEnable < 10.54 Reflected XSS in InstanceScope Parameter of CAL/compose.aspx

LOW 24CWE-79Published 2025-12-09 · Updated 2026-05-14

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

MailEnable versions prior to 10.54 contain a reflected cross-site scripting (XSS) vulnerability in the InstanceScope parameter of /Mondo/lang/sys/Forms/CAL/compose.aspx. The InstanceScope value is not properly sanitized when processed via a GET request and is reflected inside a <script> block in the JavaScript variable var gInstanceScope. By supplying a crafted payload that terminates the existing PageLoad() function, inserts attacker-controlled script, and comments out remaining code, a remote attacker can execute arbitrary JavaScript in a victim’s browser. Successful exploitation can redirect victims to malicious sites, steal non-HttpOnly cookies, inject arbitrary HTML or CSS, and perform actions as the authenticated user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00395 33rd percentileScored 2026-11-07

Fix Fixed MailEnable (MailEnable): 10.54

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
MailEnable	MailEnable	before 10.54	10.54	Patch available	CNA

MailEnable VendorMailEnable Affected before 10.54 Fixed in 10.54 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mailenable:mailenable:::::standard:::*	before 10.54	Vulnerable	MailEnable

cpe:2.3:a:mailenable:mailenable:*:*:*:*:standard:*:*:* Versions before 10.54 Vulnerable ·MailEnable

Remediation

Fix · CNA MailEnable (MailEnable) Fixed in 10.54

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2025-12-09
MailEnable 10.54
14 records Highest priority Priority LOW 14 LOW
Other records, highest priority first
- TI-2025-24473 MailEnable < 10.54 DLL Hijacking via Unsafe Loading of MEAINFY.DLLPriority LOW 38
- TI-2025-24484 MailEnable < 10.54 Reflected XSS in Added Parameter of MAI/AddRecipientsResult.aspxPriority LOW 31
- TI-2025-24480 MailEnable < 10.54 Reflected XSS in FieldTo Parameter of AddressBook.aspxPriority LOW 30
Show all 14 records →

Timeline

2026-10-02 Threatist record created from CVE-2025-34404
2026-10-03 Alias added: GHSA-xgq2-qc35-hwwp

References

Patch 1

https://mailenable.com/Standard-ReleaseNotes.txt

Other 1

https://www.mailenable.com/

TI-2025-28598 Cross Site Scripting (XSS) vulnerability in MailEnable before v10 allows a remote… CVSS 3.1CRITICAL 9.8
TI-2026-25313 MailEnable < 10.55 Reflected XSS via ManageShares.aspx SelectedIndex Parameter CVSS 4.0MEDIUM 5.1
TI-2026-25315 MailEnable < 10.55 Reflected XSS via FreeBusy.aspx StartDate Parameter CVSS 4.0MEDIUM 5.1
TI-2026-25314 MailEnable < 10.55 Reflected XSS via FreeBusy.aspx StartDate Parameter CVSS 4.0MEDIUM 5.1
TI-2015-07656 MailEnable before 8.60 allows Privilege Escalation because admin accounts could be… CVSS 3.0CRITICAL 9.8
TI-2015-07658 MailEnable before 8.60 allows XXE via an XML document in the request.aspx Options parameter. CVSS 3.1CRITICAL 10.0

See all 49 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences