{"id":"CVE-2021-26829","aliases":["EUVD-2021-13614","GHSA-6pvv-xrf9-29m6"],"status":"published","title":"OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via...","description":"OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.4805,"percentile":0.98874,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-06-11T11:05:23Z","modified":"2026-06-17T03:43:50Z","kev":{"date_added":"2025-11-28","due_date":"2025-12-19","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2025-11-28"},{"source":"kev","since":"2025-11-28"}],"products":[{"vendor":"openplc","product":"scadabr"},{"vendor":"scadabr","product":"scadabr"}],"references":[{"url":"https://youtu.be/Xh6LPCiLMa8","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"http://forum.scadabr.com.br/t/report-falhas-de-seguranca-em-versoes-do-scadabr/3615/4","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://www.forescout.com/blog/anatomy-of-a-hacktivist-attack-russian-aligned-group-targets-otics/","tags":["third-party-advisory","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26829","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26829"},{"url":"https://www.forescout.com/blog/anatomy-of-a-hacktivist-attack-russian-aligned-group-targets-otics"},{"url":"https://github.com/advisories/GHSA-6pvv-xrf9-29m6"}],"sources":{"cve":[{"id":"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.","status":"published","published":"2021-06-11T11:05:23Z","modified":"2025-12-02T04:56:04.472Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:57.368269Z"}],"euvd":[{"id":"EUVD-2021-13614","description":"OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.","status":"published","published":"2021-06-11T11:05:23Z","modified":"2025-12-02T04:56:04Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"exploited_since":"2025-11-28","updated_at":"2026-11-02T19:49:11.096002Z"}],"ghsa":[{"id":"GHSA-6pvv-xrf9-29m6","title":"OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via...","description":"OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm.","status":"published","published":"2022-05-24T19:05:12Z","modified":"2025-11-28T21:31:18Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:04:59.128724Z"}],"kev":[{"id":"CVE-2021-26829","title":"OpenPLC ScadaBR Cross-site Scripting Vulnerability","description":"OpenPLC ScadaBR contains a cross-site scripting vulnerability via system_settings.shtm.","cwes":["CWE-79"],"kev":{"date_added":"2025-11-28","due_date":"2025-12-19","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"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.","status":"published","published":"2021-06-11T12:15:12.053Z","modified":"2026-06-17T03:43:50.063Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:54.439974Z"}]}}