Security readout for executives and security teams
Plain-English summary
CVE-2021-29827 is a clickjacking issue in IBM InfoSphere Information Server 11.7. An attacker could trick a user into visiting a malicious site and hijack their clicks, potentially causing unintended actions. The known impact is limited confidentiality and integrity loss, with no availability impact stated.
Executive priority
Treat as a moderate remediation item. It is not evidenced as actively exploited, but affected systems may support sensitive data workflows, so exposed or administrator-used deployments should be handled promptly.
Technical view
The vulnerability is mapped to CWE-1021 and described by IBM as a cross-frame scripting/clickjacking flaw in InfoSphere Information Server 11.7. CVSS 3.1 is 5.2 with required user interaction, low attack complexity, no privileges required, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure is limited to environments running IBM InfoSphere Information Server 11.7. Systems not using that product and version are not indicated as affected in the provided sources. Internet-facing or broadly reachable user interfaces may increase business relevance.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. The described attack depends on persuading a victim to visit a malicious website and interact with framed or manipulated content.
Researcher notes
Do not assume broader IBM product impact beyond InfoSphere Information Server 11.7. The source bundle does not provide exploit details or a named patch level. Validation should focus on asset version, exposure, and IBM advisory status.
Mitigation direction
- Review IBM's advisory for the supported remediation path.
- Inventory IBM InfoSphere Information Server 11.7 deployments.
- Prioritize remediation for externally reachable or privileged-user portals.
- Restrict access to the application interface where business operations allow.
- Track vendor remediation status through normal change management.
Validation and detection
- Confirm whether IBM InfoSphere Information Server 11.7 is deployed.
- Check whether IBM's advisory remediation has been applied.
- Identify exposed application URLs and administrative entry points.
- Review browser-facing responses for anti-framing protections where applicable.
- Document compensating controls if vendor remediation is pending.
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-1021: 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-2021-29827 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
- 5.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:L/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:A/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.2MediumVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/pages/security-bulletin-ibm-infosphere-information-server-vulnerable-cross-frame-scripting-exploit-cve-2021-29827CVE reference · vendor-advisory
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 Restriction of Rendered UI Layers or Frames
Improper Restriction of Rendered UI Layers or Frames represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.