CVE-2022-44351 is a critical deserialization vulnerability identified in Skycaiji version 2.5.1, specifically within the /SkycaijiApp/admin/controller/Mystore.php component. Deserialization vulnerabilities occur when untrusted data is used to abuse the process of converting serialized data back into objects, potentially allowing attackers to execute arbitrary code, escalate privileges, or cause denial of service. In this case, the vulnerability allows remote attackers to send specially crafted serialized input to the affected endpoint without requiring authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). The vulnerability impacts confidentiality, integrity, and availability, with a CVSS score of 9.8 (critical). Although no known exploits are currently reported in the wild, the ease of exploitation and the severity of impact make this a significant threat. The lack of vendor or product information beyond the Skycaiji version suggests this is a niche or less widely known software, but the vulnerability class (CWE-502) is well understood and commonly exploited in various contexts. The absence of available patches at the time of reporting increases the urgency for mitigation and monitoring.

For European organizations using Skycaiji v2.5.1, this vulnerability poses a severe risk. Successful exploitation could lead to full system compromise, including unauthorized data access, data manipulation, and service disruption. This is particularly critical for organizations relying on Skycaiji for data scraping or aggregation, as attackers could leverage this vulnerability to infiltrate internal networks, exfiltrate sensitive information, or disrupt business operations. Given the vulnerability requires no authentication or user interaction, attackers can remotely exploit it at scale, increasing the risk of widespread impact. The potential for complete system takeover threatens confidentiality, integrity, and availability, which could result in regulatory non-compliance (e.g., GDPR violations), financial losses, and reputational damage. Additionally, if exploited within critical infrastructure or sectors such as finance, healthcare, or government, the consequences could be more severe, including operational disruption and national security concerns.

1. Immediate mitigation should include isolating any systems running Skycaiji v2.5.1 from untrusted networks to reduce exposure. 2. Implement strict network-level access controls and firewall rules to restrict inbound traffic to the vulnerable endpoint (/SkycaijiApp/admin/controller/Mystore.php). 3. Monitor network traffic and application logs for unusual or suspicious serialized data payloads targeting the vulnerable endpoint. 4. If possible, disable or restrict the functionality of the affected component until a patch or vendor guidance is available. 5. Employ web application firewalls (WAFs) with custom rules to detect and block malicious deserialization attempts. 6. Conduct a thorough inventory to identify all instances of Skycaiji in the environment to ensure comprehensive coverage. 7. Engage with the software vendor or community to obtain patches or updates addressing this vulnerability. 8. Educate security teams about deserialization attack patterns to improve detection and response capabilities. 9. Consider deploying runtime application self-protection (RASP) tools that can detect and prevent exploitation attempts in real time.