picocms Pico - Host Header Injection Enables Script Source Hijacking

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72574
StatePUBLISHED
AssignerTuranSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 11:17:30 UTC
Updated2026-08-10 19:17:32 UTC
DescriptionA host header injection vulnerability in picocms/Pico through 2.1.4 allows an unauthenticated remote attacker to control the origin of JavaScript and CSS assets loaded by the default theme. When base_url is unset (the default), Pico::getBaseUrl in lib/Pico.php builds the base URL from unvalidated Host, X-Forwarded-Host, X-Forwarded-Proto, and X-Forwarded-Port request headers.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

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

EPSS: 0.002410000 probability, percentile 0.153320000 (date 2026-08-11)

Problem Types: CWE-644 | CWE-644 CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax

VersionSourceTypeScoreSeverityVector
3.1309f9ea4-e3e9-4c6c-b79d-e8eb01244f2cSecondary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1CNACVSS6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Picocms Pico affected 2.1.4 semver Not specified

References

ReferenceSourceLinkTags
github.com/picocms/Pico 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c github.com
github.com/picocms/Pico/blob/master/lib/Pico.php 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c github.com
picocms.org 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c picocms.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Nurmurodov Asadbek (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-10T10:32:53.000ZCVE Reserved
CNA2026-08-10T10:32:53.000ZPublic Disclosure

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