Security readout for executives and security teams
Plain-English summary
CVE-2021-21823 is a privacy issue in Komoot’s friend finder. An unauthenticated network attacker could make crafted requests that disclose sensitive information. The sources rate it medium, with confidentiality impact only. It matters most where employees use affected Komoot mobile versions with personal or business-linked profile data.
Executive priority
Handle as a privacy and data-exposure cleanup item, not an emergency infrastructure incident. Prioritize if affected Komoot use exists among executives, field teams, or managed-device users with sensitive identity or contact data.
Technical view
The issue is CWE-359 information disclosure in Komoot friend finder, affecting versions 10.26.9 through 11.1.11 as listed. CVSS 3.0 is 5.3: network reachable, low complexity, no privileges or user interaction, confidentiality low, no integrity or availability impact.
Likely exposure
Exposure is limited to organizations with users running the affected Komoot versions, especially on managed devices or accounts tied to identifiable staff data. The source bundle does not identify server-side exposure, enterprise products, or non-Komoot affected software.
Exploitation context
The provided CVE data says specially crafted network requests can trigger disclosure. CISA KEV is false in the bundle, and no cited source here states active exploitation. Treat exploit status as unconfirmed rather than active.
Researcher notes
Evidence is narrow: one CVE record and Talos reference. The source bundle does not provide exploit details, fixed versions, or observed exploitation. Validation should focus on version presence, data sensitivity, and vendor remediation status.
Mitigation direction
- Inventory managed devices for affected Komoot versions listed in the CVE.
- Review Komoot or Talos guidance for a fixed release; sources do not name one.
- Prioritize updates or removal through MDM where affected versions are present.
- Review policies for personal apps handling contact or friend-discovery data on corporate devices.
Validation and detection
- Confirm whether Komoot is installed on managed devices or approved app catalogs.
- Check installed versions against 10.26.9, 11.0.14, and 11.1.11.
- Determine whether users linked corporate identities, contacts, or visible profile data.
- Record that KEV is false and active exploitation is not evidenced in provided sources.
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-359: 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-2021-21823 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/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1288CVE 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.
Exposure of Private Personal Information to an Unauthorized Actor
Exposure of Private Personal Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.