Security readout for executives and security teams
Plain-English summary
This CVE is a browser-based XSS risk in Baremetrics' date range picker. If an attacker can influence a Calendar placeholder value, malicious HTML or JavaScript may run in a user's browser. Impact depends on where the component is embedded and what user data or actions are available there.
Executive priority
Treat as a targeted web application risk, not an emergency. Prioritize if the component appears on authenticated, customer, billing, or administrative pages with dynamic placeholder content.
Technical view
baremetrics-calendar 1.0.14 and earlier render untrusted placeholder entries when creating a Calendar instance. The issue is CWE-79 XSS with CVSS 3.1 score 6.1. It is network reachable, low complexity, requires user interaction, and sources state there are no known patches.
Likely exposure
Exposure is likely limited to applications using Baremetrics calendar 1.0.14 or earlier where external users can influence the Calendar placeholder field. Static, developer-controlled placeholder text lowers practical risk.
Exploitation context
The bundle does not show KEV listing or active exploitation evidence. Exploitation requires a victim to interact with a page using the vulnerable Calendar instance and an attacker-controlled placeholder value.
Researcher notes
Evidence identifies the sink as placeholder handling in Calendar.js and states no known patch. The key validation question is data flow: whether attacker-controlled content can reach placeholder when Calendar is instantiated.
Mitigation direction
- Inventory use of Baremetrics calendar and identify versions 1.0.14 or earlier.
- Do not pass user-controlled values into Calendar placeholder fields.
- Sanitize or encode placeholder values before rendering.
- Consider replacing the component if vendor guidance remains unavailable.
- Check Baremetrics or upstream repository guidance for any later remediation.
Validation and detection
- Search frontend dependencies for baremetrics-calendar or Baremetrics calendar code.
- Review Calendar instance creation sites for dynamic placeholder sources.
- Confirm whether placeholder values can be influenced by users or external data.
- Verify deployed bundles do not contain vulnerable vendored Calendar.js versions.
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-79: 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-2021-32859 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/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:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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 Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.