Vulnerability-Lookup

GHSA-9FMM-H59X-WR53

Vulnerability from github – Published: 2026-06-29 15:32 – Updated: 2026-06-29 15:32

Details

FrontAccounting before 2.4.20 contains a path traversal vulnerability in the attachment upload handler that allows authenticated attackers to execute arbitrary code by uploading files with traversal sequences in the unique_name parameter. Attackers can supply path traversal sequences ../../../shell.php to write files outside the intended attachments directory into the web root, and by uploading PHP files without extension validation, achieve remote code execution as the web server user.

Severity

8.8 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-40521"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-29T14:16:50Z",
    "severity": "HIGH"
  },
  "details": "FrontAccounting before 2.4.20 contains a path traversal vulnerability in the attachment upload handler that allows authenticated attackers to execute arbitrary code by uploading files with traversal sequences in the unique_name parameter. Attackers can supply path traversal sequences ../../../shell.php to write files outside the intended attachments directory into the web root, and by uploading PHP files without extension validation, achieve remote code execution as the web server user.",
  "id": "GHSA-9fmm-h59x-wr53",
  "modified": "2026-06-29T15:32:06Z",
  "published": "2026-06-29T15:32:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40521"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FrontAccountingERP/FA/commit/701fea6848da4a02fb83d30f07a9c0473d6b7e33"
    },
    {
      "type": "WEB",
      "url": "https://jivasecurity.com/writeups/frontaccounting-rce-attachment-upload-cve-2026-40521"
    },
    {
      "type": "WEB",
      "url": "https://sourceforge.net/p/frontaccounting/news/2026/04/release-2420"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/frontaccounting-path-traversal-rce-via-attachment-upload"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-40521 (GCVE-0-2026-40521)

Vulnerability from cvelistv5 – Published: 2026-06-29 12:30 – Updated: 2026-06-30 13:52 X_Open Source

Title

FrontAccounting < 2.4.20 Path Traversal RCE via attachment upload

Summary

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

VulnCheck

References

4 references

URL	Tags
https://jivasecurity.com/writeups/frontaccounting…	technical-descriptionexploit
https://sourceforge.net/p/frontaccounting/news/20…	release-notes
https://github.com/FrontAccountingERP/FA/commit/7…	patch
https://www.vulncheck.com/advisories/frontaccount…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
FrontAccounting	FrontAccounting	Affected: 0 , < 2.4.20 (semver) Unaffected: 701fea6848da4a02fb83d30f07a9c0473d6b7e33 (git)

Date Public

2026-04-23 00:00

Credits

Jiva (JivaSecurity)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40521",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-30T13:52:27.188594Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-30T13:52:34.224Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "FrontAccounting",
          "vendor": "FrontAccounting",
          "versions": [
            {
              "lessThan": "2.4.20",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "701fea6848da4a02fb83d30f07a9c0473d6b7e33",
              "versionType": "git"
            }
          ]
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      "credits": [
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          "type": "finder",
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          "lang": "en",
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        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "providerUrgency": "NOT_DEFINED",
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            "subConfidentialityImpact": "NONE",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "scenarios": [
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      "providerMetadata": {
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      "references": [
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          "tags": [
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        },
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          "url": "https://sourceforge.net/p/frontaccounting/news/2026/04/release-2420/"
        },
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          "url": "https://github.com/FrontAccountingERP/FA/commit/701fea6848da4a02fb83d30f07a9c0473d6b7e33"
        },
        {
          "tags": [
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          "url": "https://www.vulncheck.com/advisories/frontaccounting-path-traversal-rce-via-attachment-upload"
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      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "tags": [
        "x_open-source"
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  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
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    "datePublished": "2026-06-29T12:30:12.799Z",
    "dateReserved": "2026-04-13T20:29:02.810Z",
    "dateUpdated": "2026-06-30T13:52:34.224Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-9FMM-H59X-WR53

CVE-2026-40521 (GCVE-0-2026-40521)

Tags

Sightings

Nomenclature