CVE-2026-8080

MISP core - Stored XSS in MISP template (old engine) element attribute type

Assigner: CIRCL
Reserved: 07.05.2026 Published: 07.05.2026 Updated: 07.05.2026

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in misp allows Stored XSS.

This issue affects MISP before 2.5.37.

A stored cross-site scripting vulnerability exists in the template element attribute handling logic. The application accepted arbitrary values for the TemplateElementAttribute type and category fields without validating them against the known MISP attribute type and category definitions. An attacker with permission to create or modify template element attributes could store a crafted type value.

This affects the old templating (not more accessible in 2.5.37) engine from MISP which will be removed in 2.5.38

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Green
CVSS Score: 6.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	Active

CVSS 4.0

Product Status

Vendor	misp
Product	misp
Versions	Default: unaffected affected from 0 to 2.5.37 (excl.)

Vendor

misp

Product

misp

Versions

Default: unaffected

affected from 0 to 2.5.37 (excl.)

Credits

Luciano Righetti remediation developer
Bjørn Helseth (TV 2 Norway) finder

References

Problem Types

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') CWE

Impacts

CAPEC-592 Stored XSS