CVE-2026-129133 (GCVE-0-2026-129133)

Vulnerability from cvelistv5 – Published: 2026-11-13 16:23 – Updated: 2026-11-13 16:23
VLAI
Title
MRBS before 1.13.0 CSV Formula Injection via Report Export
Summary
MRBS before 1.13.0 contains a CSV formula injection vulnerability that allows authenticated users to inject spreadsheet formulas because the escape() function in web/report.php fails to neutralize leading formula characters. Attackers can store formulas in booking names, descriptions or custom fields that execute when privileged users open exported CSV reports, enabling data exfiltration or command execution via DDE.
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
meeting-room-booking-system mrbs-code Affected: 0 , < 1.13.0 (semver)
Create a notification for this product.
Date Public
2026-11-12 00:00
Credits
leediay153 from Viettel Post John Beranek
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/meeting-room-booking-system/mrbs-code",
          "product": "mrbs-code",
          "vendor": "meeting-room-booking-system",
          "versions": [
            {
              "lessThan": "1.13.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "leediay153 from Viettel Post"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "John Beranek"
        }
      ],
      "datePublic": "2026-11-12T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "MRBS before 1.13.0 contains a CSV formula injection vulnerability that allows authenticated users to inject spreadsheet formulas because the escape() function in web/report.php fails to neutralize leading formula characters. Attackers can store formulas in booking names, descriptions or custom fields that execute when privileged users open exported CSV reports, enabling data exfiltration or command execution via DDE."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
          },
          "format": "CVSS"
        },
        {
          "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"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1236",
              "description": "Improper Neutralization of Formula Elements in a CSV File",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-13T16:23:35.501Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-9rvp-v4ff-wpwr)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/meeting-room-booking-system/mrbs-code/security/advisories/GHSA-9rvp-v4ff-wpwr"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/meeting-room-booking-system/mrbs-code/commit/92f6f5610072ddb9e1b38074c410fc8be56947ed"
        },
        {
          "name": "mrbs-code v1.13.0 Release Notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/meeting-room-booking-system/mrbs-code/releases/tag/v1.13.0"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/meeting-room-booking-system/mrbs-code/blob/299686ed64174a66448699f5ca0fb5e0e0ea9faa/web/report.php#L542-L543"
        },
        {
          "name": "VulnCheck Advisory: MRBS before 1.13.0 CSV Formula Injection via Report Export",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/mrbs-before-1.13.0-csv-formula-injection-via-report-export"
        }
      ],
      "title": "MRBS before 1.13.0 CSV Formula Injection via Report Export",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-129133",
    "datePublished": "2026-11-13T16:23:35.501Z",
    "dateReserved": "2026-11-13T16:01:04.407Z",
    "dateUpdated": "2026-11-13T16:23:35.501Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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