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{"cveTags": [], "descriptions": [{"lang": "en", "value": "changedetection.io is a free open source web page change detection tool. Prior to 0.54.8, the @login_optionally_required decorator is placed before (outer to) @blueprint.route() instead of after it. In Flask, @route() must be the outermost decorator because it registers the function it receives. When the order is reversed, @route() registers the original undecorated function, and the auth wrapper is never in the call chain. This silently disables authentication on these routes. This vulnerability is fixed in 0.54.8."}], "id": "CVE-2026-35490", "lastModified": "2026-04-09T15:16:12.097", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-07T16:16:27.317", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-jmrh-xmgh-x9j4"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-jmrh-xmgh-x9j4"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-863"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.54.8)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "changedetection.io", "source": "cna", "vendor": "dgtlmoon"}, "product": "changedetection.io", "vendor": "dgtlmoon"}], "analysis": {"en": {"generated_at": "2026-04-07T22:50:32.800347+00:00", "value": {"mitigation_remediation": ["Update changedetection.io to version 0.54.8 or later where the decorator order has been corrected."], "summary": {"action": "Immediate Patch", "impact": "Authentication Bypass"}, "threat_synthesis": {"affected_systems": "The affected product is changedetection.io from dgtlmoon, versions prior to 0.54.8. Users running these earlier releases are susceptible if the web interface exposes routes that should require login.", "description_and_impact": "The flaw arises from incorrect ordering of Flask decorators, causing the authentication wrapper to be omitted from the route handlers. As a result, any request to protected endpoints is served without validating credentials, giving attackers unrestricted access. This vulnerability aligns with CWE-863, representing authentication bypass issues.", "risk_and_exploitability": "With a CVSS score of 9.8, the vulnerability is considered critical. The EPSS score is unavailable but the lack of a KEV listing does not mitigate the high potential for exploitation. An attacker can exploit this remotely by sending unauthenticated HTTP requests to the affected endpoints, gaining full control over the application's functionality without needing valid credentials."}}}}, "created": "2026-04-08T19:37:17.080166+00:00", "updated": "2026-04-08T19:48:34.929199+00:00", "vendors": ["dgtlmoon", "dgtlmoon$PRODUCT$changedetection.io"]}