CVE-2025-6050Network attack vector

Stored XSS via unescaped blog post titles

Published Jun 17, 2025 · Updated Jul 24, 2025

Stored XSS in Jupo Systems Mezzanine before 6.1.1 allows remote authenticated users to execute JavaScript in an administrator's browser. The displayable_links_js function inserts unescaped blog post titles into JavaScript returned by /admin/displayable_links.js. Exploitation requires an administrator-created malicious title and another administrator to open the endpoint, exposing that browser session to script actions.

CVSS severity4.8
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Jupo Systems Mezzanine before 6.1.1 allows remote authenticated users to execute JavaScript in an administrator's browser. The displayable_links_js function inserts unescaped blog post titles into JavaScript returned by /admin/displayable_links.js. Exploitation requires an administrator-created malicious title and another administrator to open the endpoint, exposing that browser session to script actions.

The record

CVE
CVE-2025-6050
Published
Jun 17, 2025
Updated
Jul 24, 2025
Vendor
Jupo Systems
Product
Mezzanine
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.1 <6.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Jupo Systems · Mezzanineversion=0.1 <6.1.1

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.8GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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