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CVE-2026-18817

📛 CVE Title

Baserow Inactive Non-Staff User serializers.py BaserowImpersonateAuthTokenSerializer improper authorization

Description

A security flaw has been discovered in Baserow up to 2.3.2. Affected by this issue is the function BaserowImpersonateAuthTokenSerializer of the file backend/src/baserow/api/admin/users/serializers.py of the component Inactive Non-Staff User Handler. Performing a manipulation results in improper authorization. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitation is known to be difficult. The presence of this vulnerability remains uncertain at this time. Upgrading to version 2.3.3 can resolve this issue. The affected component should be upgraded. The project maintainer explains: "While the problem exists, I'm not really sure if it's a vulnerability. (....) Even though the back gives a token for a deactivate user, none of the endpoints actually work. That said, we will fix it, but so far it seems more like a bug instead of a vulnerability."

Overview

State
PUBLISHED
Assigner (CNA)
VulDB
CVSS severity
LOW
CVSS score
CVSS 2.1 / 10 2.1 2.1 / 10
CVSS vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X
Effective score
2.1 / 10 LOW source: CNA overview
CWE(s)
CWE-285, CWE-266
Reserved
2026-08-04
Published
2026-08-04 22:00 UTC
Last updated
2026-08-04 22:00 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/18xxx/CVE-2026-18817.json

Affected products (1)

VendorProductVersionsPlatforms
n/a Baserow 2.3.0 (affected), 2.3.1 (affected), 2.3.2 (affected), 2.3.3 (unaffected)

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-18817.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:baserow:baserow:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Inactive Non-Staff User Handler"
          ],
          "product": "Baserow",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "2.3.0"
            },
            {
              "status": "affected",
              "version": "2.3.1"
            },
            {
              "status": "affected",
              "version": "2.3.2"
            },
            {
              "status": "unaffected",
              "version": "2.3.3"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "GalaxynX (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A security flaw has been discovered in Baserow up to 2.3.2. Affected by this issue is the function BaserowImpersonateAuthTokenSerializer of the file backend/src/baserow/api/admin/users/serializers.py of the component Inactive Non-Staff User Handler. Performing a manipulation results in improper authorization. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitation is known to be difficult. The presence of this vulnerability remains uncertain at this time. Upgrading to version 2.3.3 can resolve this issue. The affected component should be upgraded. The project maintainer explains: \"While the problem exists, I'm not really sure if it's a vulnerability. (....) Even though the back gives a token for a deactivate user, none of the endpoints actually work. That said, we will fix it, but so far it seems more like a bug instead of a vulnerability.\""
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 2.2,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 2.2,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N/E:X/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 1.7,
            "vectorString": "AV:N/AC:H/Au:M/C:N/I:P/A:N/E:ND/RL:OF/RC:C",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-266",
              "description": "Incorrect Privilege Assignment",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-04T22:00:12.012Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-385816 | Baserow Inactive Non-Staff User serializers.py BaserowImpersonateAuthTokenSerializer improper authorization",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/385816"
        },
        {
          "name": "VDB-385816 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/385816/cti"
        },
        {
          "name": "CVE-2026-18817 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-18817"
        },
        {
          "name": "Submit #857942 | baserow c34eb053be98bc0d04fcbf9b2d6b305cba0d5647 CWE-285 Improper Authorization",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/857942"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/baserow/baserow/releases/tag/2.3.3"
        }
      ],
      "tags": [
        "disputed"
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-08-04T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-08-04T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-08-04T14:59:21.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Baserow Inactive Non-Staff User serializers.py BaserowImpersonateAuthTokenSerializer improper authorization",
      "x_generator": [
        "VulDB PVTS v202608"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-18817",
    "datePublished": "2026-08-04T22:00:12.012Z",
    "dateReserved": "2026-08-04T12:54:10.835Z",
    "dateUpdated": "2026-08-04T22:00:12.012Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}