Cybersecurity professionals are grappling with a new information disclosure vulnerability, CVE-2025-14847, dubbed “MongoBleed,” which presents a significant risk due to its widespread use of the affected software. Concerns are mounting as researchers and threat hunters work to understand the full scope of potential impacts, drawing parallels to previous critical vulnerabilities with similar naming conventions.
The vulnerability, officially designated CVE-2025-14847, affects numerous versions of MongoDB, an open-source database widely adopted across industries. In its default configuration, it allows unauthenticated attackers to extract sensitive information from server memory, potentially exposing credentials, API keys, and other confidential data. MongoDB publicly disclosed the vulnerability on December 19, with further escalation occurring on December 26 when a proof-of-concept exploit was released.
Active Exploitation and Widespread Vulnerability of MongoDB
Multiple cybersecurity firms have reported that CVE-2025-14847 is actively being exploited in the wild, prompting the Cybersecurity and Infrastructure Security Agency (CISA) to add it to its catalog of known exploited vulnerabilities. The ubiquity of MongoDB, described as nearly ubiquitous by researchers, amplifies the risk associated with this information disclosure flaw.
Research from Wiz indicates that 42% of cloud environments contain at least one instance of a MongoDB version susceptible to CVE-2025-14847. This includes both publicly accessible and internal resources, highlighting the broad attack surface. Data from Shadowserver scans showed nearly 75,000 potentially unpatched MongoDB instances out of almost 79,000 publicly exposed ones as of Monday.
The countries with the highest concentration of exposed and potentially vulnerable MongoDB instances include China, the United States, Germany, France, Hong Kong, India, and Singapore. This geographical distribution suggests a global risk landscape for organizations that have not yet applied the necessary patches.
Technical Details and Impact of MongoBleed
With a CVSS score of 8.7, the vulnerability is considered high severity. Ben Read, director of strategic threat intelligence at Wiz, noted that the concern stems from the large install base, ease of exploitation, and the lack of durable forensic evidence left behind. “Because it’s a memory-leak vulnerability, there isn’t malware left on the disk, or any durable forensic evidence that data was accessed,” Read explained.
Wiz has observed exploitation attempts, but has not yet been able to attribute this malicious activity to specific threat groups. It is anticipated that a wide variety of actors will exploit this weakness, given past patterns. MongoDB has urged customers to upgrade to a patched version, emphasizing that vulnerabilities date back to 2017, broadening the range of susceptible deployments.
The holiday season may also be contributing to a delayed response and reduced visibility into exploitation. “Many security teams are likely to have reduced capacity this week, which may contribute to a longer tail on observed exploitation details and threat actor attribution,” said Caitlin Condon, vice president of research at VulnCheck. Condon added that while public information suggests trivial exploitation, “an adversary still has to be able to get useful data out of an attack flow.”
The true impact of the MongoBleed vulnerability remains under investigation. Details regarding real-world attacks have been scarce, according to VulnCheck, which is tracking over a dozen public proof-of-concept exploits. The next expected step is for organizations to apply the available MongoDB patches to mitigate the risk. Uncertainties remain regarding the full extent of data compromise and specific threat actor attribution.