← Back to CVEs

CVE-2026-27639

MEDIUM

5.4

Description

Mercator is an open source web application designed to enable mapping of information systems. A stored Cross-Site Scripting (XSS) vulnerability exists in Mercator prior to version 2026.02.22 due to the use of unescaped Blade directives (`{!! !!}`) in display templates. An authenticated user with the User role can inject arbitrary JavaScript payloads into fields such as "contact point" when creating or editing entities. The payload is then executed in the browser of any user who views the affected page, including administrators. Version 2026.02.22 fixes the vulnerability.

CVE Details

CVSS v3.1 Score5.4

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

Published2/25/2026

Last Modified2/27/2026

Sourcenvd

Honeypot Sightings0

Affected Products

sourcentis:mercator

Weaknesses (CWE)

CWE-79

References

https://github.com/dbarzin/mercator/commit/839d231399944e43a865198262e96e0218252cc3(security-advisories@github.com)

https://github.com/dbarzin/mercator/commit/9902ffd91f287e474729f514c77261f4ef7db8fe(security-advisories@github.com)

https://github.com/dbarzin/mercator/commit/c58bb1d2fff18605c61d93cfaf77adca416c560a(security-advisories@github.com)

https://github.com/dbarzin/mercator/security/advisories/GHSA-65p7-pph2-966g(security-advisories@github.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.