Security readout for executives and security teams
Plain-English summary
Sticky Notes Widget 3.0.6 can be crashed by overly large note input on iOS devices. The reported impact is denial of service to the app, not data theft or device takeover. Treat exposure as limited to users or managed devices with this specific app version installed.
Executive priority
Prioritize for mobile fleets that use this app, especially where app availability matters operationally. The business risk is disruption from app crashes, not a confirmed breach path. Patch or remove once vendor guidance is confirmed.
Technical view
The bundle describes CWE-789 in Sticky Notes Widget 3.0.6, where excessive character input in note fields can crash the application. CVSS 4.0 score is 8.7 with high availability impact. The sources do not identify confidentiality, integrity, sandbox escape, or system-level impact.
Likely exposure
Exposure appears limited to iOS devices running Sticky Notes Widget version 3.0.6. Organizations without this app, or without the affected version, are unlikely to be exposed based on the provided sources.
Exploitation context
A public ExploitDB reference exists, so proof-of-concept details are public. The bundle says KEV is false and provides no cited evidence of active exploitation. Do not assume exploitation in the wild without additional vendor or threat-intelligence confirmation.
Researcher notes
Evidence is narrow and source-limited. The CVE record reports high availability impact and references ExploitDB and VulnCheck, but the bundle does not provide a vendor fix, affected version range beyond 3.0.6, or active exploitation evidence.
Mitigation direction
- Inventory iOS devices for Sticky Notes Widget 3.0.6.
- Check the vendor or App Store for updated guidance or fixed versions.
- Remove or restrict the affected app where business need is low.
- Advise users not to process untrusted oversized note content.
- Monitor for repeated crashes of the affected application.
Validation and detection
- Confirm whether Sticky Notes Widget is installed on managed iOS devices.
- Verify installed version numbers against 3.0.6.
- Review mobile device management inventory and app crash telemetry.
- Check vendor advisory channels for patch or mitigation updates.
- Document exceptions for devices retaining the affected app.
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-789: 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-2021-47973 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
- High
- CVSS
- 8.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA: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.
SSVC decision data
CVSS vector scores
2 official scoresWe 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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N——VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6VulnCheckVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49978CVE reference, VulnCheck · exploit
- VulnCheck Advisory: Sticky Notes Widget 3.0.6 Denial of Service via Buffer OverflowCVE reference, VulnCheck · third-party-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.
Memory Allocation with Excessive Size Value
Memory Allocation with Excessive Size Value represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.