{"schemaVersion":3,"id":"CVE-2025-62780","aliases":["GHSA-4c3j-3h7v-22q9","PYSEC-2025-91"],"status":"published","duplicateOf":null,"title":null,"description":"changedetection.io is a free open source web page change detection tool. A Stored Cross Site Scripting is present in changedetection.io Watch update API in versions prior to 0.50.34 due to insufficient security checks. Two scenarios are possible. In the first, an attacker can insert a new watch with an arbitrary URL which really points to a web page. Once the HTML content is retrieved, the attacker updates the URL with a JavaScript payload. In the second, an attacker substitutes the URL in an existing watch with a new URL that is in reality a JavaScript payload. When the user clicks on *Preview* and then on the malicious link, the JavaScript malicious code is executed. Version 0.50.34 fixes the issue.","dates":{"published":"2025-11-10T21:18:52.945Z","modified":"2025-11-10T21:43:52.020Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.4,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":3.5,"severity":"low","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Pypi","score":5.4,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","exploitability":5.9,"impact":4.5,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.4,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00462,"percentile":0.39027,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0.031000000000000038,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.00431},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00462,"percentile":0.39027}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00431,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00462,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00462,"percentile":0.39027}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_DGTLMOON_CHANGEDETECTION.IO","name":"Changedetection.Io","source":"github","url":"https://github.com/dgtlmoon/changedetection.io/issues/1358","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","description":"The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/79.html"}],"affected":[{"vendor":"changedetection","product":"changedetection","name":"changedetection","label":"changedetection","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 0.50.34","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.50.34","eol":null,"hubHref":"/vendor/changedetection/changedetection"},{"vendor":"dgtlmoon","product":"changedetection.io","name":"changedetection.io","label":"changedetection.io","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 0.50.34","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.50.34","eol":null,"hubHref":"/vendor/dgtlmoon/changedetectionio"},{"vendor":"PyPI","product":"changedetection-io","name":"changedetection-io","label":"changedetection-io","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/changedetection-io","purlType":"pypi","versions":[{"text":"< 0.50.34","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.50.34","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-4c3j-3h7v-22q9","label":"github.com/dgtlmoon/changedetection.io/security/advisories/GHSA-4c3j-3h7v-22q9","hostname":"github.com","tags":["X Refsource CONFIRM","WEB","EVIDENCE","Exploit","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-62780","label":"nvd.nist.gov/vuln/detail/CVE-2025-62780","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/dgtlmoon/changedetection.io/issues/3562","label":"github.com/dgtlmoon/changedetection.io/issues/3562","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/dgtlmoon/changedetection.io/pull/3564","label":"github.com/dgtlmoon/changedetection.io/pull/3564","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/dgtlmoon/changedetection.io","label":"github.com/dgtlmoon/changedetection.io","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://github.com/dgtlmoon/changedetection.io/releases/tag/0.50.34","label":"github.com/dgtlmoon/changedetection.io/releases/tag/0.50.34","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/changedetection-io/PYSEC-2025-91.yaml","label":"github.com/pypa/advisory-database/tree/main/vulns/changedetection-io/PYSEC-2025-91.yaml","hostname":"github.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2025-11-10T21:18:52.945Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-11-10T21:43:52.020Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":32,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T10:27:44.595Z","stale":false,"partial":false}}