Security readout for executives and security teams
Plain-English summary
Crafter CMS 3.1 had a content disclosure flaw that could let unauthenticated remote attackers read text-based private resources. The exposed material may include scripts, templates, and some non-binary Git metadata, creating confidentiality risk even without system takeover.
Executive priority
Treat this as a moderate confidentiality issue. It is not described as ransomware-grade or actively exploited in the bundle, but leaked scripts, templates, or Git text can expose sensitive implementation details and support follow-on attacks.
Technical view
CVE-2021-23263 is a CWE-402 resource leak in Crafter Engine. The CVSS 3.1 score is 5.9, with network access, no privileges, no user interaction, high attack complexity, and high confidentiality impact. Integrity and availability are not identified as impacted.
Likely exposure
Exposure is most likely where Crafter CMS 3.1 Crafter Engine is reachable by untrusted users, including public-facing sites or staging environments. The bundle does not identify other affected versions or products.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The issue is remotely reachable without authentication, but CVSS marks attack complexity as high, so practical exploitation may depend on deployment-specific conditions.
Researcher notes
Use the vendor advisory and CVE data as the evidence base. Do not assume broader version impact, exploit availability, or a specific fixed version from this bundle alone. Validation should focus on Crafter CMS 3.1 exposure and sensitive text disclosure.
Mitigation direction
- Identify all Crafter CMS 3.1 deployments and their internet exposure.
- Review the Crafter advisory for vendor-supported remediation or upgrade guidance.
- Restrict untrusted access to Crafter Engine where business operations allow.
- Audit exposed templates, scripts, and Git text for sensitive information.
- Rotate secrets if exposed resources contained credentials or operational tokens.
Validation and detection
- Confirm whether Crafter CMS 3.1 is deployed in production, staging, or test.
- Check whether Crafter Engine is reachable from untrusted networks.
- Review web logs for unusual access to scripts, templates, or Git text paths.
- Assess whether exposed files contain credentials, internal logic, or deployment details.
- Track remediation against the vendor advisory before closing the finding.
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-402: 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-2021-23263 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
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
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:H/PR:N/UI:N/S:U/C:H/I:N/A:N2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://docs.craftercms.org/en/3.1/security/advisory.html#cv-2021120106CVE 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.
Transmission of Private Resources into a New Sphere ('Resource Leak')
Transmission of Private Resources into a New Sphere ('Resource Leak') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.