# CVE-2026-28756: Zohocorp ManageEngine Exchange Reporter Plus stored XSS in Distribution Groups report

Source: https://junglewise.ai/threats/cve-2026-28756-zohocorp-manageengine-exchange-reporter-plus-stored-xss-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-03. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-28756 · Severity: high · CVSS 7.3 · Published 2026-04-03

ManageEngine Exchange Reporter Plus, a tool used for monitoring and reporting on Microsoft Exchange environments, is vulnerable to a security flaw in its reporting module. An attacker with basic access can inject malicious scripts into specific reports, which then execute when an administrator views them. This could allow the attacker to hijack administrative sessions, potentially leading to unauthorized access to sensitive email data or system configurations.

Technologies: [Zoho Corporation Exchange Reporter Plus](https://junglewise.ai/threats/technologies/exchange-reporter-plus). Vendors: [Zoho Corporation](https://junglewise.ai/threats/vendors/zoho-corporation).

## Quick answers

**Is CVE-2026-28756 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-28756 being exploited in the wild.

**How severe is CVE-2026-28756?** High severity, with a CVSS score of 7.3, published 3 April 2026.

**Which products and versions are affected?** Zoho Corporation Exchange Reporter Plus Builds 5801 and below.

**Is there a fix for CVE-2026-28756?** A patch was published on 2026-03-19: Fixed in version 5802 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-28756 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-28756?** Check whether you run Zoho Corporation Exchange Reporter Plus at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stored cross-site scripting (XSS) vulnerability exists in ManageEngine Exchange Reporter Plus (builds 5801 and below) within the 'Permissions based on Distribution Groups' report. The root cause is improper neutralization of input during web page generation (CWE-79). An authenticated attacker with low-level privileges can inject malicious scripts into the report data; these scripts are subsequently executed in the browser of any user (typically an administrator) who views the affected report. This can lead to session hijacking or unauthorized actions performed in the context of the victim's browser. The issue is resolved in version 5802 through improved input validation.

## Affected products

- Zohocorp ManageEngine Exchange Reporter Plus Builds 5801 and below

## Timeline

- 2026-03-19: patched: Fixed in version 5802
- 2026-04-03: disclosed: Initial advisory publication

## References

- [https://www.manageengine.com/products/exchange-reports/advisory/CVE-2026-28756.html](https://www.manageengine.com/products/exchange-reports/advisory/CVE-2026-28756.html)

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