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CVE

CVE-2026-27639

Mercator vulnerable to stored XSS via unescaped Blade directives in display templates
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CVE

CVE-2026-27639

Mercator vulnerable to stored XSS via unescaped Blade directives in display templates

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.5
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/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
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27639.json, https://github.com/dbarzin/mercator/security/advisories/GHSA-65p7-pph2-966g, https://nvd.nist.gov/vuln/detail/CVE-2026-27639, https://github.com/dbarzin/mercator/commit/839d231399944e43a865198262e96e0218252cc3, https://github.com/dbarzin/mercator/commit/9902ffd91f287e474729f514c77261f4ef7db8fe, https://github.com/dbarzin/mercator/commit/c58bb1d2fff18605c61d93cfaf77adca416c560a

Severity

0

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
0
EPSS Probability
0.0005%
EPSS Percentile
0.15406%
Introduced Version
0
Fix Available
f82430b18ae79339234a3cf191c5d58b165458d1

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