Security readout for executives and security teams
Plain-English summary
CVE-2021-36431 is a critical SQL injection issue reported in jocms 0.8. A remote attacker could use the vulnerable code path to run SQL queries and access sensitive information. The source data does not identify a vendor fix or confirm real-world exploitation.
Executive priority
Treat this as high-priority for any confirmed jocms 0.8 deployment because it may expose sensitive data and allow database tampering. If jocms is not present, the immediate business risk is low, but asset inventory should confirm that conclusion.
Technical view
The CVE describes CWE-89 SQL injection in the jo_json_check() function in jocms/apps/mask/inc/mask.php. CVSS 3.1 is 9.1 with network access, low complexity, no privileges, and no user interaction. Confidentiality and integrity impact are high; availability impact is not rated.
Likely exposure
Exposure appears limited to organizations running jocms 0.8, especially if reachable over the internet. The CVE affected-product metadata is incomplete, so teams should verify deployments by application name, version, and referenced file path rather than relying only on CPE matching.
Exploitation context
The vulnerability is remotely reachable and unauthenticated according to the CVSS vector, which raises urgency. The source bundle does not show CISA KEV listing or other evidence of active exploitation, so active exploitation should not be assumed.
Researcher notes
The public record is sparse: it names jocms 0.8, a vulnerable function, and a GitHub issue, but affected vendor metadata is n/a and no patch is named in the provided bundle. Avoid overstating exploitation or fix availability.
Mitigation direction
- Identify any jocms 0.8 deployments across internet-facing and internal assets.
- Check the project issue and CVE sources for vendor guidance or fixes.
- Restrict external access to affected jocms instances until remediation is confirmed.
- Disable or isolate the affected component if business operations allow.
- Increase monitoring for suspicious database errors or unusual requests to the referenced path.
Validation and detection
- Confirm whether any deployed application is jocms 0.8.
- Review deployed code for jo_json_check() in jocms/apps/mask/inc/mask.php.
- Check web logs for unusual access to the referenced mask.php path.
- Verify database logs for unexpected query patterns from the web application.
- Document whether the instance is public, authenticated, or internally restricted.
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-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. 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 lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-36431 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
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:L/PR:N/UI:N/S:U/C:H/I:H/A:N3.95.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/mxgbr/jocms/issues/6CVE 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 Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.