Security readout for executives and security teams
Plain-English summary
This issue affects Crafter CMS 3.1. A logged-in administrator may be able to overwrite the system configuration file, causing the service to become unavailable. The business risk is operational disruption rather than data theft, and exploitability is limited by the need for administrator privileges and user interaction.
Executive priority
Treat as a moderate operational resilience issue. Prioritize if Crafter CMS 3.1 supports business-critical publishing or has broad administrator access, but it is less urgent than unauthenticated remote code execution or data exposure flaws.
Technical view
CVE-2021-23261 is a denial-of-service flaw in Crafter CMS 3.1 involving improper handling of system configuration override behavior. CVSS 3.1 score is 4.5 with network access, low complexity, high privileges, required user interaction, and high availability impact only.
Likely exposure
Exposure is most likely in organizations running Crafter CMS 3.1 with administrator access available to multiple users or exposed management interfaces. Systems not running Crafter CMS 3.1 are not identified as affected in the supplied sources.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. The described attack requires authenticated administrator privileges, so insider misuse, compromised admin accounts, or poorly governed admin access are the main concern.
Researcher notes
Evidence is limited to the CVE record, CVSS vector, affected product entry, and Crafter advisory reference. No exploit details, patch version, or workaround text is present in the supplied bundle, so remediation should be tied to vendor guidance.
Mitigation direction
- Review the Crafter CMS advisory for vendor-confirmed fixes or workarounds.
- Restrict administrator access to trusted users only.
- Remove or disable unnecessary administrator accounts.
- Enforce strong authentication for administrator accounts.
- Maintain recoverable backups of system configuration files.
- Monitor configuration changes for unexpected overwrites.
Validation and detection
- Inventory Crafter CMS deployments and identify any version 3.1 instances.
- Review administrator account lists and recent privilege changes.
- Check audit logs for unexpected system configuration modifications.
- Confirm configuration backups can restore service availability.
- Track vendor guidance before declaring remediation complete.
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-703: 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-2021-23261 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
- 4.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H
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:N/I:N/A:H0.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://docs.craftercms.org/en/3.1/security/advisory.html#cv-2021120104CVE reference · x_refsource_MISC
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 Check or Handling of Exceptional Conditions
Improper Check or Handling of Exceptional Conditions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.