Stored Cross-Site Scripting (XSS) vulnerability in Sesame web application, due to the fact that uploaded SVG images are not properly sanitized. This allows attackers to embed malicious scripts in SVG files by sending a POST request using the 'logo' parameter in '/api/v3/companies/<ID>/logo', which are then stored on the server and executed in the context of any user who accesses the compromised resource.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0006.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
SESAME LABS S.L Sesame unaffected
Version Status Constraints
all versions affected —

No data.

No data.

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Vendors Products
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Project Subscriptions

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Sesame Subscribe
Sesame Labs S.l Subscribe
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Advisories

No advisories yet.

Fixes

Solution

Sesame has implemented corrective measures at both the backend and frontend levels. In addition, previously uploaded files have been reviewed. Currently, the system completely blocks the upload of SVG files, and existing content has been cleaned up, rendering the vulnerability fixed.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.incibe.es/en/incibe-cert/notices/aviso/stored-cross-site-scripting-xss-sesame-web-application cve-icon cve-icon
History

Thu, 29 Jan 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared Sesame Labs S.l
Sesame Labs S.l sesame
CPEs cpe:2.3:a:sesame_labs_s.l:sesame:all_versions:*:*:*:*:*:*:*
Vendors & Products Sesame Labs S.l
Sesame Labs S.l sesame

Wed, 21 Jan 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Sesame Labs
Sesame Labs sesame
Vendors & Products Sesame Labs
Sesame Labs sesame

Tue, 20 Jan 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 20 Jan 2026 09:30:00 +0000

Type Values Removed Values Added
Description Stored Cross-Site Scripting (XSS) vulnerability in Sesame web application, due to the fact that uploaded SVG images are not properly sanitized. This allows attackers to embed malicious scripts in SVG files by sending a POST request using the 'logo' parameter in '/api/v3/companies/<ID>/logo', which are then stored on the server and executed in the context of any user who accesses the compromised resource.
Title Stored Cross-Site Scripting (XSS) in Sesame web application
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: INCIBE

Published:

Updated: 2026-01-29T11:33:18.995Z

Reserved: 2025-04-16T09:09:35.597Z

Link: CVE-2025-41084

cve-icon Vulnrichment

Updated: 2026-01-20T14:42:40.542Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-20T10:16:05.773

Modified: 2026-01-26T15:05:23.427

Link: CVE-2025-41084

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-21T11:19:41Z

Weaknesses