{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/opencart-3.0.3.8/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":9.8,"id":"CVE-2021-47923"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["OpenCart 3.0.3.8"],"_cs_severities":["high"],"_cs_tags":["opencart","session-fixation","CVE-2021-47923","webserver"],"_cs_type":"advisory","_cs_vendors":["OpenCart"],"content_html":"\u003cp\u003eOpenCart 3.0.3.8 is susceptible to a session fixation vulnerability, identified as CVE-2021-47923. This flaw allows a remote attacker to hijack legitimate user sessions by injecting arbitrary values into the \u003ccode\u003eOCSESSID\u003c/code\u003e cookie. By setting a malicious \u003ccode\u003eOCSESSID\u003c/code\u003e value, the attacker can force the server to associate the victim\u0026rsquo;s session with the attacker-controlled session ID. This vulnerability enables unauthorized access to user accounts without requiring the attacker to know the user\u0026rsquo;s credentials directly. A successful attack could lead to account takeover, data theft, and modification of user profiles.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies an OpenCart 3.0.3.8 instance.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious \u003ccode\u003eOCSESSID\u003c/code\u003e cookie value.\u003c/li\u003e\n\u003cli\u003eThe attacker injects the malicious \u003ccode\u003eOCSESSID\u003c/code\u003e cookie value into a victim\u0026rsquo;s browser session. This can be achieved through various methods, such as phishing or man-in-the-middle attacks.\u003c/li\u003e\n\u003cli\u003eThe victim visits the OpenCart site, and their browser sends the manipulated \u003ccode\u003eOCSESSID\u003c/code\u003e cookie.\u003c/li\u003e\n\u003cli\u003eThe OpenCart server accepts the attacker-controlled \u003ccode\u003eOCSESSID\u003c/code\u003e value and associates it with the victim\u0026rsquo;s session.\u003c/li\u003e\n\u003cli\u003eThe attacker uses the same malicious \u003ccode\u003eOCSESSID\u003c/code\u003e cookie to access the OpenCart site.\u003c/li\u003e\n\u003cli\u003eThe server recognizes the attacker\u0026rsquo;s session as the victim\u0026rsquo;s, granting the attacker unauthorized access.\u003c/li\u003e\n\u003cli\u003eThe attacker can now perform actions as the victim, such as viewing personal information, modifying settings, or making purchases.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this session fixation vulnerability can result in complete account takeover. An attacker can gain unauthorized access to sensitive user data, including personal information, order history, and payment details. This can lead to financial loss for the victim, reputational damage to the OpenCart store, and potential legal liabilities. Given the high CVSS score (9.8), this vulnerability poses a significant risk to OpenCart users.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade to a patched version of OpenCart that addresses CVE-2021-47923.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetect OpenCart Session Fixation Attempt via OCSESSID Manipulation\u003c/code\u003e to monitor for suspicious OCSESSID cookie values.\u003c/li\u003e\n\u003cli\u003eImplement server-side checks to validate the legitimacy of the \u003ccode\u003eOCSESSID\u003c/code\u003e cookie.\u003c/li\u003e\n\u003cli\u003eEnforce strict cookie policies, including setting the \u003ccode\u003eHttpOnly\u003c/code\u003e and \u003ccode\u003eSecure\u003c/code\u003e flags for the \u003ccode\u003eOCSESSID\u003c/code\u003e cookie to prevent client-side script access and transmission over unencrypted connections.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-10T13:18:34Z","date_published":"2026-05-10T13:18:34Z","id":"https://feed.craftedsignal.io/briefs/2026-05-opencart-session-fixation/","summary":"OpenCart 3.0.3.8 is vulnerable to session fixation (CVE-2021-47923), allowing attackers to hijack user sessions by injecting arbitrary values into the OCSESSID cookie, leading to unauthorized access.","title":"OpenCart Session Fixation Vulnerability (CVE-2021-47923)","url":"https://feed.craftedsignal.io/briefs/2026-05-opencart-session-fixation/"}],"language":"en","title":"CraftedSignal Threat Feed — OpenCart 3.0.3.8","version":"https://jsonfeed.org/version/1.1"}