{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2021-47972/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.5,"id":"CVE-2021-47972"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Sticky Notes \u0026 Color Widgets 1.4.2"],"_cs_severities":["medium"],"_cs_tags":["denial of service","application crash","cve-2021-47972"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eSticky Notes \u0026amp; Color Widgets 1.4.2 is susceptible to a denial-of-service (DoS) vulnerability. This vulnerability, identified as CVE-2021-47972, allows a remote, unauthenticated attacker to crash the application. By crafting notes containing excessively long character strings, an attacker can exhaust the application\u0026rsquo;s resources, leading to a crash and rendering the application unresponsive. The vulnerability was reported on May 16, 2026.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker opens the Sticky Notes \u0026amp; Color Widgets application.\u003c/li\u003e\n\u003cli\u003eAttacker creates a new note within the application.\u003c/li\u003e\n\u003cli\u003eAttacker pastes a large payload of repeated characters (an excessively long string) into the note\u0026rsquo;s text field.\u003c/li\u003e\n\u003cli\u003eThe application attempts to allocate memory to store the overly large note content.\u003c/li\u003e\n\u003cli\u003eDue to the excessive size of the string, the memory allocation fails or consumes excessive resources.\u003c/li\u003e\n\u003cli\u003eThe application becomes unresponsive as it struggles to process the oversized data.\u003c/li\u003e\n\u003cli\u003eThe application crashes due to resource exhaustion or a memory allocation error.\u003c/li\u003e\n\u003cli\u003eThe Sticky Notes \u0026amp; Color Widgets application is no longer available to the user until restarted.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability results in a denial-of-service condition. The Sticky Notes \u0026amp; Color Widgets application becomes unusable, disrupting the user\u0026rsquo;s workflow. While the vulnerability does not lead to data loss or compromise of the system, it can cause inconvenience and temporary loss of productivity. The CVSS v3.1 base score for this vulnerability is 7.5, indicating a high impact on availability.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor application logs for unusual memory allocation patterns, which could indicate exploitation attempts.\u003c/li\u003e\n\u003cli\u003eImplement input validation to limit the size of notes created within the application to mitigate CVE-2021-47972.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule to identify potential attempts to exploit the denial-of-service vulnerability.\u003c/li\u003e\n\u003cli\u003eConsider contacting the vendor for a patch or update addressing CVE-2021-47972.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-16T16:21:17Z","date_published":"2026-05-16T16:21:17Z","id":"https://feed.craftedsignal.io/briefs/2026-05-sticky-notes-dos/","summary":"Sticky Notes \u0026 Color Widgets 1.4.2 is vulnerable to denial of service via excessively long character strings (CVE-2021-47972), allowing attackers to crash the application.","title":"Sticky Notes \u0026 Color Widgets 1.4.2 Denial of Service Vulnerability (CVE-2021-47972)","url":"https://feed.craftedsignal.io/briefs/2026-05-sticky-notes-dos/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2021-47972","version":"https://jsonfeed.org/version/1.1"}