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Vulnerability Details :

CVE-2026-53907

Summary
Assigner-CERT-PL
Assigner Org ID-4bb8329e-dd38-46c1-aafb-9bf32bcb93c6
Published At-01 Jul, 2026 | 11:58
Updated At-01 Jul, 2026 | 13:38
Rejected At-
Credits

Stored Cross‑Site Scripting in MCO

MCO is vulnerable to Stored Cross‑Site Scripting (XSS) via the application logo upload functionality. An attacker with the ability to change the application logo can upload a crafted SVG file containing malicious JavaScript code that is executed when the logo is rendered or opened. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:CERT-PL
Assigner Org ID:4bb8329e-dd38-46c1-aafb-9bf32bcb93c6
Published At:01 Jul, 2026 | 11:58
Updated At:01 Jul, 2026 | 13:38
Rejected At:
▼CVE Numbering Authority (CNA)
Stored Cross‑Site Scripting in MCO

MCO is vulnerable to Stored Cross‑Site Scripting (XSS) via the application logo upload functionality. An attacker with the ability to change the application logo can upload a crafted SVG file containing malicious JavaScript code that is executed when the logo is rendered or opened. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

Affected Products
Vendor
MyComplianceOffice
Product
MCO
Default Status
unknown
Versions
Affected
  • 25.3.3.1 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-79CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Type: CWE
CWE ID: CWE-79
Description: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Metrics
VersionBase scoreBase severityVector
4.04.8MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
Version: 4.0
Base score: 4.8
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-63CAPEC-63 Cross-Site Scripting (XSS)
CAPEC ID: CAPEC-63
Description: CAPEC-63 Cross-Site Scripting (XSS)
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Hubert Decyusz (AFINE Team)
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://cert.pl/en/posts/2026/07/CVE-2026-53902
third-party-advisory
https://mco.mycomplianceoffice.com/
product
Hyperlink: https://cert.pl/en/posts/2026/07/CVE-2026-53902
Resource:
third-party-advisory
Hyperlink: https://mco.mycomplianceoffice.com/
Resource:
product
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cvd@cert.pl
Published At:01 Jul, 2026 | 13:17
Updated At:01 Jul, 2026 | 18:05

MCO is vulnerable to Stored Cross‑Site Scripting (XSS) via the application logo upload functionality. An attacker with the ability to change the application logo can upload a crafted SVG file containing malicious JavaScript code that is executed when the logo is rendered or opened. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.04.8MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
N/A
Type: Secondary
Version: 4.0
Base score: 4.8
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-79Secondarycvd@cert.pl
CWE ID: CWE-79
Type: Secondary
Source: cvd@cert.pl
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://cert.pl/en/posts/2026/07/CVE-2026-53902cvd@cert.pl
N/A
https://mco.mycomplianceoffice.com/cvd@cert.pl
N/A
Hyperlink: https://cert.pl/en/posts/2026/07/CVE-2026-53902
Source: cvd@cert.pl
Resource: N/A
Hyperlink: https://mco.mycomplianceoffice.com/
Source: cvd@cert.pl
Resource: N/A

Change History

0
Information is not available yet

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