# CVE-2026-3879: Zohocorp ManageEngine Exchange Reporter Plus Stored XSS in Equipment Mailbox Details report

Source: https://junglewise.ai/threats/cve-2026-3879-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-2026-3879 · Severity: high · CVSS 7.3 · Published 2026-04-03

ManageEngine Exchange Reporter Plus, a reporting and auditing solution for Microsoft Exchange environments, is vulnerable to a security flaw in its Equipment Mailbox Details report. An attacker with administrative access to the Exchange organization can inject malicious scripts into the reporting interface. If another user views the compromised report, the attacker could potentially take over their session or perform unauthorized actions within the application.

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-2026-3879 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-3879 being exploited in the wild.

**How severe is CVE-2026-3879?** 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-2026-3879?** 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-2026-3879 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-3879?** 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 the Equipment Mailbox Details report within the Reports module of ManageEngine Exchange Reporter Plus. The flaw is caused by improper input validation of data retrieved from the Exchange environment. An authenticated attacker with Exchange administrative privileges can inject malicious scripts that are stored and later executed in the browser of any user who views the affected report. This could lead to session hijacking or unauthorized administrative actions within the Exchange Reporter Plus console. The issue is resolved in version 5802.

## 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-2026-3879.html](https://www.manageengine.com/products/exchange-reports/advisory/CVE-2026-3879.html)

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