Security readout for executives and security teams
Plain-English summary
CVE-2023-29456 is a medium-severity Zabbix flaw involving inefficient validation of user-supplied URL schemes. The available data indicates exploitation requires high privileges and user interaction, but successful abuse could expose sensitive information and cause limited integrity or availability impact.
Executive priority
Treat this as a planned security update, not an emergency, unless affected Zabbix systems are broadly administered or hold sensitive monitoring data. Prioritize patching because confidentiality impact is high, even though exploitation appears constrained.
Technical view
The issue is categorized as CWE-20 improper input validation in Zabbix URL schema parsing. The CVSS 3.1 vector is AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:L, indicating network reachability, low attack complexity, high privileges required, and user interaction required.
Likely exposure
Exposure is most likely in Zabbix deployments matching the listed affected versions: 4.0.0, 5.0.0, 6.0.0, 6.4.0, and 7.0.0alpha1. Debian-packaged Zabbix may also be relevant because Debian LTS advisories are cited.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector suggests abuse is constrained by high privilege requirements and user interaction, but confidentiality impact is rated high if exploited.
Researcher notes
Evidence is limited to the CVE record, Zabbix issue reference, and Debian LTS references. The bundle does not provide exploit details, fixed upstream versions, or proof of active exploitation. Avoid assuming more affected products or branches than listed.
Mitigation direction
- Review Zabbix and Debian advisories for fixed package or release guidance.
- Upgrade affected Zabbix installations according to vendor or distribution instructions.
- Limit privileged Zabbix UI access to trusted administrators.
- Apply least-privilege roles for users who can submit or manage URLs.
- Monitor vendor issue ZBX-22987 for any updated remediation details.
Validation and detection
- Inventory Zabbix versions across servers, containers, and packaged deployments.
- Compare installed versions against the affected versions listed in the CVE bundle.
- Check Debian package changelogs if using Debian LTS packages.
- Confirm privileged Zabbix accounts are limited and reviewed.
- Document whether remediation follows Zabbix upstream or Debian guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-29456 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:L0.94.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.7MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://support.zabbix.com/browse/ZBX-22987CVE reference
- https://lists.debian.org/debian-lts-announce/2023/08/msg00027.htmlCVE reference
- https://lists.debian.org/debian-lts-announce/2024/10/msg00000.htmlCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.