Stored XSS in SOPlanning_CVE-2026-40544

5.1 / 10

MEDIUM

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

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.

This issue affects SOPlanning version 1.55 and below.

Basic Information

ID CVE-2026-40544

Source CERT-PL

Published Jun 1, 2026 at 09:03

Affected Product

Vendor SOPlanning

Product SOPlanning

Affected Versions SOPlanning SOPlanning 0

CWE Classification

CWE-79

References

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    "lastseen": "",
    "description": "SOPlanning is vulnerable to Stored Cross-Site Scripting (XSS) via /process/upload_backup endpoint.\u00a0An 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\u2019s browser when a user clicks the Edit button for the malicious backup.\n\nThis issue affects SOPlanning version 1.55 and below.",
    "published": "2026-06-01T09:03:49.850Z",
    "modified": "2026-06-01T09:03:49.850Z",
    "type": "cve",
    "title": "Stored XSS in SOPlanning",
    "source": "CERT-PL",
    "references": "https://cert.pl/en/posts/2026/06/CVE-2026-40543\nhttps://www.soplanning.org/en/",
    "id": "CVE-2026-40544",
    "bulletinFamily": "",
    "cwe": [
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    "cvelist": null,
    "sourceData": "SOPlanning SOPlanning 0",
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    "cvss": {
        "score": 5.1,
        "severity": "MEDIUM",
        "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
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    "product": "SOPlanning",
    "version": "0",
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}