{"id":"CVE-2026-40544","aliases":["EUVD-2026-33610","GHSA-hgm3-4mgq-cfx8"],"status":"published","title":"Stored XSS in SOPlanning","description":"SOPlanning is vulnerable to Stored Cross-Site Scripting (XSS) via /process/upload_backup endpoint. An authenticated attacker with access to the backup functionality can upload a crafted ZIP archive containing a malicious user.csv file with embedded JavaScript. The injected code is executed in the victim’s browser when a user clicks the Edit button for the malicious backup.\n\nThis issue affects SOPlanning version 1.55 and below.","severity":{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00295,"percentile":0.22291,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-06-01T09:03:49Z","modified":"2026-07-22T07:10:00Z","products":[{"vendor":"soplanning","product":"soplanning"}],"references":[{"url":"https://cert.pl/en/posts/2026/06/CVE-2026-40543","tags":["third-party-advisory"]},{"url":"https://www.soplanning.org/en/","tags":["product"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40544"},{"url":"https://www.soplanning.org/en"},{"url":"https://github.com/advisories/GHSA-hgm3-4mgq-cfx8"}],"sources":{"cve":[{"id":"CVE-2026-40544","title":"Stored XSS in SOPlanning","description":"SOPlanning is vulnerable to Stored Cross-Site Scripting (XSS) via /process/upload_backup endpoint. An authenticated attacker with access to the backup functionality can upload a crafted ZIP archive containing a malicious user.csv file with embedded JavaScript. The injected code is executed in the victim’s browser when a user clicks the Edit button for the malicious backup.\n\nThis issue affects SOPlanning version 1.55 and below.","status":"published","published":"2026-06-01T09:03:49.85Z","modified":"2026-06-01T13:06:47.877Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:43:00.288193Z"}],"euvd":[{"id":"EUVD-2026-33610","description":"SOPlanning is vulnerable to Stored Cross-Site Scripting (XSS) via /process/upload_backup endpoint. An authenticated attacker with access to the backup functionality can upload a crafted ZIP archive containing a malicious user.csv file with embedded JavaScript. The injected code is executed in the victim’s browser when a user clicks the Edit button for the malicious backup.\n\nThis issue affects SOPlanning version 1.55 and below.","status":"published","published":"2026-06-01T09:03:49Z","modified":"2026-06-01T13:06:47Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:20:58.729223Z"}],"ghsa":[{"id":"GHSA-hgm3-4mgq-cfx8","title":"SOPlanning is vulnerable to Stored Cross-Site Scripting (XSS) via /process/upload_backup endpoint...","description":"SOPlanning is vulnerable to Stored Cross-Site Scripting (XSS) via /process/upload_backup endpoint. An authenticated attacker with access to the backup functionality can upload a crafted ZIP archive containing a malicious user.csv file with embedded JavaScript. The injected code is executed in the victim’s browser when a user clicks the Edit button for the malicious backup.\n\nThis issue affects SOPlanning version 1.55 and below.","status":"published","published":"2026-06-01T09:31:13Z","modified":"2026-06-01T09:31:21Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:08:26.25145Z"}],"nvd":[{"id":"CVE-2026-40544","description":"SOPlanning is vulnerable to Stored Cross-Site Scripting (XSS) via /process/upload_backup endpoint. An authenticated attacker with access to the backup functionality can upload a crafted ZIP archive containing a malicious user.csv file with embedded JavaScript. The injected code is executed in the victim’s browser when a user clicks the Edit button for the malicious backup.\n\nThis issue affects SOPlanning version 1.55 and below.","status":"published","published":"2026-06-01T09:16:17.163Z","modified":"2026-07-22T07:10:00.107Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:21.635958Z"}]}}