---
id: CVE-2026-115513
title: OpenCATS before 0.12.0 Stored XSS via MRU Navigation Panel
summary: >-
  OpenCATS before 0.12.0 contains a stored cross-site scripting vulnerability
  that allows a low-privileged authenticated user to inject HTML/JavaScript
  payloads by setting a Candidate, Company, Contact, Job Order, or List
  name/title field,…
severity: high
cvss: 8.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: opencats
product: OpenCATS
affected:
  - OpenCATS >= 0.10.0 < 0.12.0
published: '2026-10-22'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T16:52:10.542Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115513'
references:
  - url: >-
      https://github.com/opencats/OpenCATS/commit/f82e0ee3045845b90b7e111c46f30998496e38a8
  - url: 'https://github.com/opencats/OpenCATS/commits/master/lib/MRU.php'
  - url: 'https://github.com/opencats/OpenCATS/releases/tag/v0.12.0'
    label: Vendor Patch
  - url: >-
      https://www.vulncheck.com/advisories/opencats-before-stored-xss-via-mru-navigation-panel
    label: >-
      VulnCheck Advisory: OpenCATS before 0.12.0 Stored XSS via MRU Navigation
      Panel
tags:
  - cve.org
ingestedAt: '2026-10-22T22:00:50.347Z'
---

## Overview

OpenCATS before 0.12.0 contains a stored cross-site scripting vulnerability that allows a low-privileged authenticated user to inject HTML/JavaScript payloads by setting a Candidate, Company, Contact, Job Order, or List name/title field, which is stored unsanitized and later rendered unescaped in the 'Recent' (MRU) navigation panel displayed on nearly every page via lib/MRU.php's getFormatted() function. Attackers can exploit this by crafting a malicious record name that executes arbitrary JavaScript in the session of any other user, including Site Administrators, who views the record, enabling session/cookie theft and privilege escalation to full administrative control.

## Affected

- `OpenCATS >= 0.10.0 < 0.12.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.