CVE-2026-27645

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.54.1)"}}], "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": "2026-04-17T15:25:24.197219+00:00", "value": {"mitigation_remediation": ["Apply the official patch by upgrading changedetection.io to version 0.54.1 or later.", "When an upgrade is delayed, restrict or remove access to the RSS single\u2011watch endpoint to trusted users or disable the feature entirely.", "Ensure that any user\u2011supplied parameters are properly validated or sanitized before inclusion in HTTP responses, following best practices for preventing reflected XSS."], "summary": {"action": "Immediate Patch", "impact": "Reflected XSS"}, "threat_synthesis": {"affected_systems": "Products affected are the open\u2011source web page change detection tool changedetection.io from vendor dgtlmoon. All releases before 0.54.1 contain the flaw; version 0.54.1 implements a fix that sanitizes the UUID parameter. No additional product variants are listed.", "description_and_impact": "An attacker can exploit a reflected cross\u2011site scripting vulnerability in the RSS single\u2011watch endpoint of changedetection.io. The UUID supplied in the request is reflected directly into the HTML response without escaping, allowing malicious JavaScript to be executed in the victim\u2019s browser. This flaw compromises confidentiality, integrity, and availability of the web UI for authenticated and unauthenticated users depending on the endpoint\u2019s exposure. The weakness maps to CWE\u201179.", "risk_and_exploitability": "The CVSS score of 6.1 indicates a medium risk, and the EPSS score of less than 1% shows low likelihood of exploitation at this time. The vulnerability is not catalogued in the CISA KEV list, suggesting no known widespread attacks. Exploitation requires a victim to load a crafted URL in a browser, making it accessible via social engineering or phishing. Because the payload is reflected, an attacker need only supply a malicious UUID; no privileged access or code execution outside the browser context is required."}}}}, "created": "2026-02-25T11:34:37.535383+00:00", "updated": "2026-04-17T15:30:06.031840+00:00", "vendors": ["dgtlmoon", "dgtlmoon$PRODUCT$changedetection.io"]}