CVE-2026-33738

Lychee is a free, open-source photo-management tool. Prior to version 7.5.3, the photo `description` field is stored without HTML sanitization and rendered using `{!! $item->summary !!}` (Blade unescaped output) in the RSS, Atom, and JSON feed templates. The `/feed` endpoint is publicly accessible without authentication, allowing any RSS reader to execute attacker-controlled JavaScript. Version 7.5.3 fixes the issue.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/LycheeOrg/Lychee/commit/d2e2606a0223d5a384d5b806db1b31eb587adc5c	Patch
https://github.com/LycheeOrg/Lychee/pull/4218	Issue Tracking
https://github.com/LycheeOrg/Lychee/releases/tag/v7.5.3	Release Notes
https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9j	Exploit Vendor Advisory
https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9j	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-26 21:17

Updated : 2026-06-17 10:38

NVD link : CVE-2026-33738

Mitre link : CVE-2026-33738

CVE.ORG link : CVE-2026-33738

JSON object : View

Products Affected

lycheeorg

lychee

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

{"id": "CVE-2026-33738", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33738", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-27T13:35:56.585454Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.3}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 4.8, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:H/SI:L/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "LycheeOrg", "product": "Lychee", "versions": [{"status": "affected", "version": "< 7.5.3"}]}]}], "published": "2026-03-26T21:17:08.110", "references": [{"url": "https://github.com/LycheeOrg/Lychee/commit/d2e2606a0223d5a384d5b806db1b31eb587adc5c", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/LycheeOrg/Lychee/pull/4218", "tags": ["Issue Tracking"], "source": "security-advisories@github.com"}, {"url": "https://github.com/LycheeOrg/Lychee/releases/tag/v7.5.3", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9j", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-5574-7f3r-hm9j", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "Lychee is a free, open-source photo-management tool. Prior to version 7.5.3, the photo `description` field is stored without HTML sanitization and rendered using `{!! $item->summary !!}` (Blade unescaped output) in the RSS, Atom, and JSON feed templates. The `/feed` endpoint is publicly accessible without authentication, allowing any RSS reader to execute attacker-controlled JavaScript. Version 7.5.3 fixes the issue."}, {"lang": "es", "value": "Lychee es una herramienta de gesti\u00f3n de fotos gratuita y de c\u00f3digo abierto. Antes de la versi\u00f3n 7.5.3, el campo `description` de la foto se almacena sin saneamiento HTML y se renderiza usando `{!! $item->summary !!}` (salida sin escape de Blade) en las plantillas de feeds RSS, Atom y JSON. El endpoint `/feed` es p\u00fablicamente accesible sin autenticaci\u00f3n, permitiendo que cualquier lector RSS ejecute JavaScript controlado por el atacante. La versi\u00f3n 7.5.3 corrige el problema."}], "lastModified": "2026-06-17T10:38:00.853", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:lycheeorg:lychee:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9FC80F07-5E2D-4C7A-8D56-32C4C8CFAA6F", "versionEndExcluding": "7.5.3"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}