{"history":[{"alert":0,"cve":"CVE-2021-26829","id":22100,"kind":"epss","observed_at":1794500401,"payload":"{\"date\": \"2026-11-12\", \"epss\": 0.4805, \"percentile\": 0.98874}"},{"alert":0,"cve":"CVE-2021-26829","id":19719,"kind":"epss","observed_at":1794327601,"payload":"{\"date\": \"2026-11-10\", \"epss\": 0.4805, \"percentile\": 0.98867}"},{"alert":0,"cve":"CVE-2021-26829","id":17685,"kind":"epss","observed_at":1794241201,"payload":"{\"date\": \"2026-11-09\", \"epss\": 0.4805, \"percentile\": 0.98865}"},{"alert":0,"cve":"CVE-2021-26829","id":15749,"kind":"epss","observed_at":1794154800,"payload":"{\"date\": \"2026-11-08\", \"epss\": 0.4805, \"percentile\": 0.98865}"},{"alert":0,"cve":"CVE-2021-26829","id":13727,"kind":"epss","observed_at":1794068402,"payload":"{\"date\": \"2026-11-07\", \"epss\": 0.4805, \"percentile\": 0.98864}"},{"alert":0,"cve":"CVE-2021-26829","id":11509,"kind":"epss","observed_at":1793982001,"payload":"{\"date\": \"2026-11-06\", \"epss\": 0.4805, \"percentile\": 0.98862}"},{"alert":0,"cve":"CVE-2021-26829","id":9495,"kind":"epss","observed_at":1793938800,"payload":"{\"date\": \"2026-11-05\", \"epss\": 0.4805, \"percentile\": 0.98861}"},{"alert":1,"cve":"CVE-2021-26829","id":8511,"kind":"cna","observed_at":1793895600,"payload":"{\"containers\": {\"adp\": [{\"providerMetadata\": {\"dateUpdated\": \"2024-08-03T20:33:41.158Z\", \"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\"}, \"references\": [{\"tags\": [\"x_refsource_MISC\", \"x_transferred\"], \"url\": \"https://youtu.be/Xh6LPCiLMa8\"}, {\"tags\": [\"x_refsource_MISC\", \"x_transferred\"], \"url\": \"http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4\"}], \"title\": \"CVE Program Container\"}, {\"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"LOW\", \"attackVector\": \"NETWORK\", \"availabilityImpact\": \"NONE\", \"baseScore\": 5.4, \"baseSeverity\": \"MEDIUM\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"LOW\", \"privilegesRequired\": \"LOW\", \"scope\": \"CHANGED\", \"userInteraction\": \"REQUIRED\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N\", \"version\": \"3.1\"}}, {\"other\": {\"content\": {\"id\": \"CVE-2021-26829\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"role\": \"CISA Coordinator\", \"timestamp\": \"2025-12-01T00:00:00+00:00\", \"version\": \"2.0.3\"}, \"type\": \"ssvc\"}}, {\"other\": {\"content\": {\"dateAdded\": \"2025-11-28\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26829\"}, \"type\": \"kev\"}}], \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')\", \"lang\": \"en\", \"type\": \"CWE\"}]}], \"providerMetadata\": {\"dateUpdated\": \"2025-12-02T04:56:04.472Z\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\"}, \"references\": [{\"tags\": [\"third-party-advisory\"], \"url\": \"https://www.forescout.com/blog/anatomy-of-a-hacktivist-attack-russian-aligned-group-targets-otics/\"}, {\"tags\": [\"government-resource\"], \"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26829\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2025-11-28T00:00:00.000Z\", \"value\": \"CVE-2021-26829 added to CISA KEV\"}], \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"affected\": [{\"product\": \"n/a\", \"vendor\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.\"}], \"problemTypes\": [{\"descriptions\": [{\"description\": \"n/a\", \"lang\": \"en\", \"type\": \"text\"}]}], \"providerMetadata\": {\"dateUpdated\": \"2021-06-11T11:05:23.000Z\", \"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\"}, \"references\": [{\"tags\": [\"x_refsource_MISC\"], \"url\": \"https://youtu.be/Xh6LPCiLMa8\"}, {\"tags\": [\"x_refsource_MISC\"], \"url\": \"http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4\"}], \"x_legacyV4Record\": {\"CVE_data_meta\": {\"ASSIGNER\": \"cve@mitre.org\", \"ID\": \"CVE-2021-26829\", \"STATE\": \"PUBLIC\"}, \"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"product_name\": \"n/a\", \"version\": {\"version_data\": [{\"version_value\": \"n/a\"}]}}]}, \"vendor_name\": \"n/a\"}]}}, \"data_format\": \"MITRE\", \"data_type\": \"CVE\", \"data_version\": \"4.0\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"n/a\"}]}]}, \"references\": {\"reference_data\": [{\"name\": \"https://youtu.be/Xh6LPCiLMa8\", \"refsource\": \"MISC\", \"url\": \"https://youtu.be/Xh6LPCiLMa8\"}, {\"name\": \"http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4\", \"refsource\": \"MISC\", \"url\": \"http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4\"}]}}}}, \"cveMetadata\": {\"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"assignerShortName\": \"mitre\", \"cveId\": \"CVE-2021-26829\", \"datePublished\": \"2021-06-11T11:05:23.000Z\", \"dateReserved\": \"2021-02-05T00:00:00.000Z\", \"dateUpdated\": \"2025-12-02T04:56:04.472Z\", \"state\": \"PUBLISHED\"}, \"dataType\": \"CVE_RECORD\", \"dataVersion\": \"5.2\"}"},{"alert":0,"cve":"CVE-2021-26829","id":7043,"kind":"epss","observed_at":1793809200,"payload":"{\"date\": \"2026-11-04\", \"epss\": 0.4805, \"percentile\": 0.9886}"},{"alert":0,"cve":"CVE-2021-26829","id":4820,"kind":"epss","observed_at":1793722800,"payload":"{\"date\": \"2026-11-03\", \"epss\": 0.4805, \"percentile\": 0.98858}"},{"alert":0,"cve":"CVE-2021-26829","id":2602,"kind":"epss","observed_at":1793665375,"payload":"{\"date\": \"2026-11-02\", \"epss\": 0.4805, \"percentile\": 0.98857}"},{"alert":1,"cve":"CVE-2021-26829","id":303,"kind":"kev","observed_at":1793665375,"payload":"{\"cveID\": \"CVE-2021-26829\", \"cwes\": [\"CWE-79\"], \"dateAdded\": \"2025-11-28\", \"dueDate\": \"2025-12-19\", \"forensicTriage\": \"No\", \"knownRansomwareCampaignUse\": \"Unknown\", \"notes\": \"This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/SCADA-LTS/Scada-LTS/pull/3211 ; https://nvd.nist.gov/vuln/detail/CVE-2021-26829\", \"product\": \"ScadaBR\", \"requiredAction\": \"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.\", \"shortDescription\": \"OpenPLC ScadaBR contains a cross-site scripting vulnerability via system_settings.shtm.\", \"vendorProject\": \"OpenPLC\", \"vulnerabilityName\": \"OpenPLC ScadaBR Cross-site Scripting Vulnerability\"}"}],"record":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"cna":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2024-08-03T20:33:41.158Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://youtu.be/Xh6LPCiLMa8"},{"tags":["x_refsource_MISC","x_transferred"],"url":"http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4"}],"title":"CVE Program Container"},{"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}},{"other":{"content":{"id":"CVE-2021-26829","options":[{"Exploitation":"active"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2025-12-01T00:00:00+00:00","version":"2.0.3"},"type":"ssvc"}},{"other":{"content":{"dateAdded":"2025-11-28","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26829"},"type":"kev"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2025-12-02T04:56:04.472Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"references":[{"tags":["third-party-advisory"],"url":"https://www.forescout.com/blog/anatomy-of-a-hacktivist-attack-russian-aligned-group-targets-otics/"},{"tags":["government-resource"],"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26829"}],"timeline":[{"lang":"en","time":"2025-11-28T00:00:00.000Z","value":"CVE-2021-26829 added to CISA KEV"}],"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"descriptions":[{"lang":"en","value":"OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2021-06-11T11:05:23.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"tags":["x_refsource_MISC"],"url":"https://youtu.be/Xh6LPCiLMa8"},{"tags":["x_refsource_MISC"],"url":"http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-26829","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://youtu.be/Xh6LPCiLMa8","refsource":"MISC","url":"https://youtu.be/Xh6LPCiLMa8"},{"name":"http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4","refsource":"MISC","url":"http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4"}]}}}},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2021-26829","datePublished":"2021-06-11T11:05:23.000Z","dateReserved":"2021-02-05T00:00:00.000Z","dateUpdated":"2025-12-02T04:56:04.472Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"cna_checked":1794370801,"cve":"CVE-2021-26829","description":"OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.","epss":{"date":"2026-11-12","epss":0.4805,"percentile":0.98874},"epss_checked":1794522003,"first_seen":1793665375,"kev":{"cveID":"CVE-2021-26829","cwes":["CWE-79"],"dateAdded":"2025-11-28","dueDate":"2025-12-19","forensicTriage":"No","knownRansomwareCampaignUse":"Unknown","notes":"This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/SCADA-LTS/Scada-LTS/pull/3211 ; https://nvd.nist.gov/vuln/detail/CVE-2021-26829","product":"ScadaBR","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","shortDescription":"OpenPLC ScadaBR contains a cross-site scripting vulnerability via system_settings.shtm.","vendorProject":"OpenPLC","vulnerabilityName":"OpenPLC ScadaBR Cross-site Scripting Vulnerability"},"kev_checked":1794522003,"products":"n/a n/a","references":["https://youtu.be/Xh6LPCiLMa8","http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4","https://www.forescout.com/blog/anatomy-of-a-hacktivist-attack-russian-aligned-group-targets-otics/","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26829"],"score":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","provider":"CISA-ADP","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"solutions":"","state":"PUBLISHED","title":"OpenPLC ScadaBR Cross-site Scripting Vulnerability","updated_at":1794500401,"workarounds":""},"sources":[]}