Vulnerability-Lookup

UBUNTU-CVE-2026-23921 (CVE-2026-23921)

Vulnerability from osv_ubuntu – Published: 2026-03-24 19:16 – Updated: 2026-09-14 08:29 – Source website

Details

A low privilege Zabbix user with API access can exploit a blind SQL injection vulnerability in include/classes/api/CApiService.php to execute arbitrary SQL selects via the sortfield parameter. Although query results are not returned directly, an attacker can exfiltrate arbitrary database data through time-based techniques, potentially leading to session identifier disclosure and administrator account compromise.

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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-23921	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-23921	REPORT
	https://support.zabbix.com/browse/ZBX-27640	REPORT

JSON

To clipboard

{
  "affected": [
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      "ecosystem_specific": {
        "binaries": [
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            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
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  ],
  "aliases": [],
  "details": "A low privilege Zabbix user with API access can exploit a blind SQL injection vulnerability in include/classes/api/CApiService.php to execute arbitrary SQL selects via the sortfield parameter. Although query results are not returned directly, an attacker can exfiltrate arbitrary database data through time-based techniques, potentially leading to session identifier disclosure and administrator account compromise.",
  "id": "UBUNTU-CVE-2026-23921",
  "modified": "2026-09-14T08:29:55Z",
  "published": "2026-03-24T19:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-23921"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-23921"
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      "type": "REPORT",
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    }
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  "related": [],
  "schema_version": "1.7.0",
  "severity": [
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      "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",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-23921"
  ]
}

CVE-2026-23921 (GCVE-0-2026-23921)

Vulnerability from cvelistv5 – Published: 2026-03-24 18:28 – Updated: 2026-03-26 03:55

Title

Blind, read-only SQL injection in Zabbix API via sortfield parameter

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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-25 00:00 UTC

CWE

CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Assigner

Zabbix mitre root

References

1 reference

URL	Tags
https://support.zabbix.com/browse/ZBX-27640

Impacted products

1 product

Vendor	Product	Version
Zabbix	Zabbix	Affected: 7.0.0 , ≤ 7.0.21 (git) Affected: 7.2.0 , ≤ 7.2.14 (git) Affected: 7.4.0 , ≤ 7.4.5 (git)

Credits

Zabbix wants to thank SeaWind for submitting this report on the HackerOne bug bounty platform.

Show details on NVD website

JSON

To clipboard

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              "value": "\u003cp\u003eUpdate the affected components to their respective fixed versions.\u003c/p\u003e"
            }
          ],
          "value": "Update the affected components to their respective fixed versions."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Blind, read-only SQL injection in Zabbix API via sortfield parameter",
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
    "assignerShortName": "Zabbix",
    "cveId": "CVE-2026-23921",
    "datePublished": "2026-03-24T18:28:41.491Z",
    "dateReserved": "2026-01-19T14:02:54.327Z",
    "dateUpdated": "2026-03-26T03:55:36.177Z",
    "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

UBUNTU-CVE-2026-23921 (CVE-2026-23921)

CVE-2026-23921 (GCVE-0-2026-23921)

Tags

Sightings

Nomenclature

Related by attack behaviour