Security readout for executives and security teams
Plain-English summary
CVE-2021-27759 is a low-severity request-forgery issue in HCL BigFix Inventory. A logged-in user could be tricked into making their browser send an unintended request to the application. The published impact is limited to low confidentiality loss, with no stated integrity or availability impact.
Executive priority
Handle through normal vulnerability management unless the application is broadly reachable or used by privileged operators. The published severity is low, but vendor confirmation is still needed because remediation details are not included in the source bundle.
Technical view
The CVE maps to CWE-352, cross-site request forgery. The CVSS 3.1 vector is 2.3 Low, requiring adjacent access, high complexity, low privileges, and user interaction. Affected products are HCL BigFix Inventory 9.x and 10.x. The source bundle does not provide endpoint details, affected actions, or fixed versions.
Likely exposure
Exposure is limited to organizations running HCL BigFix Inventory 9.x or 10.x, especially where authenticated users access the application from browsers that can be influenced by untrusted content.
Exploitation context
The CVE record describes a browser-induced unintended request, but the bundle provides no exploit details. CISA KEV status is false, and no cited source in the bundle states active exploitation.
Researcher notes
Evidence supports a CSRF-class issue with low confidentiality impact only. The bundle lacks affected endpoints, exact sensitive action, proof-of-concept detail, patch version, and workaround text, so validation should focus on product inventory, vendor advisory review, and exposure control.
Mitigation direction
- Review HCL KB0098006 for official remediation or workaround guidance.
- Confirm whether supported BigFix Inventory updates address this CVE.
- Restrict BigFix Inventory access to trusted networks and users.
- Review least-privilege access for BigFix Inventory user roles.
- Monitor vendor advisories for any updated fix information.
Validation and detection
- Inventory all HCL BigFix Inventory 9.x and 10.x deployments.
- Check installed versions against HCL KB0098006 guidance.
- Review change records for vendor-recommended updates or mitigations.
- Confirm access controls limit who can reach the application.
- Document any remaining exposed instances and compensating controls.
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-352: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2021-27759 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
- Low
- CVSS
- 2.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N/E:F/RL:U/RC:C/CR:L/IR:L/AR:L/MAV:A/MAC:H/MPR:L/MUI:R/MS:U/MC:X/MI:N/MA: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:A/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N/E:F/RL:U/RC:C/CR:L/IR:L/AR:L/MAV:A/MAC:H/MPR:L/MUI:R/MS:U/MC:X/MI:N/MA:N0.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
2.3LowVector: CVSS:3.1/AV:A/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N/E:F/RL:U/RC:C/CR:L/IR:L/AR:L/MAV:A/MAC:H/MPR:L/MUI:R/MS:U/MC:X/MI:N/MA:N
Source materials
- CVE List V5 sourceCVE List V5
- https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0098006CVE 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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.