Security readout for executives and security teams
Plain-English summary
This vulnerability lets a remote attacker use a reverse tabnabbing flaw in affected IBM workflow products to redirect a user to a phishing site. It requires user interaction and is rated medium, but it can still create business risk where staff use these platforms for sensitive workflow approvals or credentials.
Executive priority
Treat this as a moderate phishing and trust-boundary risk. It is not known to be actively exploited, but affected IBM workflow systems may support sensitive business processes, so remediation should be scheduled and tracked rather than deferred indefinitely.
Technical view
CVE-2020-4490 affects IBM Business Automation Workflow 18 and 19, plus IBM Business Process Manager 8.0, 8.5, and 8.6. The issue is a security restriction bypass caused by reverse tabnabbing. CVSS 3.0 is 5.3 with network attack vector, no privileges required, user interaction required, high attack complexity, and high integrity impact.
Likely exposure
Exposure is most likely in organizations still running the listed IBM Business Automation Workflow or Business Process Manager versions. Risk depends on whether users access affected workflow interfaces and can be redirected through the vulnerable behavior.
Exploitation context
The source bundle does not cite active exploitation, and the CVE is not listed as KEV. CVSS marks exploit code maturity as unproven. The credible concern is phishing-driven integrity impact after user interaction, not unauthenticated server takeover.
Researcher notes
Evidence is limited to the CVE description, IBM reference, and X-Force entry. The provided sources identify affected versions and impact class but do not provide detailed exploit mechanics or named fixes in the bundle. Avoid asserting active exploitation without new evidence.
Mitigation direction
- Review IBM advisory and X-Force entry for product-specific remediation.
- Apply IBM-recommended fixes or updates for any affected versions found.
- Prioritize remediation for internet-accessible or high-trust workflow portals.
- Train administrators to treat unexpected workflow reauthentication prompts as suspicious.
Validation and detection
- Inventory IBM BAW and BPM deployments with exact versions and fix levels.
- Compare deployed versions against the affected product and version list.
- Check vulnerability management tools for CVE-2020-4490 coverage.
- Review whether exposed workflow portals are reachable by external users.
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.
CVE-2020-4490 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
- 5.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/UI:R/S:U/AV:N/PR:N/A:N/AC:H/I:H/C:N/E:U/RL:O/RC:C
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:3.0/UI:R/S:U/AV:N/PR:N/A:N/AC:H/I:H/C:N/E:U/RL:O/RC:C1.63.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/UI:R/S:U/AV:N/PR:N/A:N/AC:H/I:H/C:N/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/pages/node/6217550CVE reference · x_refsource_CONFIRM
- ibm-baw-cve20204490-sec-bypass (181989)CVE reference · vdb-entry, x_refsource_XF
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.