Security readout for executives and security teams
Plain-English summary
CVE-2021-4266 is a low-severity cross-site scripting issue in Webdetails cpf up to 9.5.0.0-80. A crafted baseUrl value could affect browser-rendered output, but exploitation requires a logged-in or privileged context and user interaction. The cited fix is upgrading to 9.5.0.0-81.
Executive priority
Schedule remediation in the normal vulnerability patch cycle, faster for internet-facing or multi-user systems. The business risk is mainly limited integrity impact through browser-side script execution, with no cited active exploitation and a vendor upgrade available.
Technical view
The issue is reported in core/src/main/java/pt/webdetails/cpf/packager/DependenciesPackage.java. Manipulating the baseUrl argument can lead to XSS. CVSS 3.1 is 3.5 with network reachability, low complexity, low privileges required, user interaction required, unchanged scope, no confidentiality impact, low integrity impact, and no availability impact.
Likely exposure
Exposure is limited to environments using Webdetails cpf version 9.5.0.0-80 or earlier, especially where the affected packaging/dependency path is reachable by users who can influence baseUrl. The source bundle does not establish broad internet exposure or affected downstream products beyond the listed component.
Exploitation context
The CVE states remote attack is possible, but privileges and user interaction are required. CISA KEV is false, and the supplied sources do not cite active exploitation or public weaponization. Treat this as a patching and hygiene issue unless local exposure raises business impact.
Researcher notes
The source bundle identifies the file and parameter but not the exact vulnerable function or exploit prerequisites beyond CVSS. Validate exposure by code path and deployed version, not product name alone. Do not assume active exploitation without additional evidence.
Mitigation direction
- Upgrade Webdetails cpf to 9.5.0.0-81.
- Verify deployments include patch commit 3bff900d228e8cae3af256b447c5d15bdb03c174.
- Prioritize systems where untrusted users can influence baseUrl.
- If upgrade is blocked, check vendor guidance for supported compensating controls.
Validation and detection
- Inventory applications and dependency manifests for Webdetails cpf versions up to 9.5.0.0-80.
- Confirm the fixed release 9.5.0.0-81 is deployed in runtime artifacts.
- Review whether affected DependenciesPackage.java behavior is exposed to authenticated users.
- Check security logs for unusual baseUrl values if relevant telemetry exists.
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
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CWE-707: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-4266 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
- 3.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N2.11.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.5LowVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/siwapp/siwapp-ror/pull/365CVE reference
- https://github.com/webdetails/cpf/releases/tag/9.5.0.0-81CVE reference
- https://github.com/webdetails/cpf/commit/3bff900d228e8cae3af256b447c5d15bdb03c174CVE reference
- https://vuldb.com/?id.216468CVE 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
Improper Neutralization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.