Threat actors are exploiting unpatched Atlassian servers to deploy a Linux variant of Cerber (aka C3RB3R) ransomware.
The attacks leverage CVE-2023-22518 (CVSS score: 9.1), a critical security vulnerability impacting the Atlassian Confluence Data Center and Server that allows an unauthenticated attacker to reset Confluence and create an administrator account.
Armed with this access, a
Atlassian has released patches for more than two dozen security flaws, including a critical bug impacting Bamboo Data Center and Server that could be exploited without requiring user interaction.
Tracked as CVE-2024-1597, the vulnerability carries a CVSS score of 10.0, indicating maximum severity.
Described as an SQL injection flaw, it's rooted in a dependency called org.postgresql:
Cloudflare has revealed that it was the target of a likely nation-state attack in which the threat actor leveraged stolen credentials to gain unauthorized access to its Atlassian server and ultimately access some documentation and a limited amount of source code.
The intrusion, which took place between November 14 and 24, 2023, and detected on November 23, was carried out "with the goal of
Malicious actors have begun to actively exploit a recently disclosed critical security flaw impacting Atlassian Confluence Data Center and Confluence Server, within three days of public disclosure.
Tracked as CVE-2023-22527 (CVSS score: 10.0), the vulnerability impacts out-of-date versions of the software, allowing unauthenticated attackers to achieve remote code execution on susceptible
Citrix is warning of two zero-day security vulnerabilities in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway) that are being actively exploited in the wild.
The flaws are listed below -
CVE-2023-6548 (CVSS score: 5.5) - Authenticated (low privileged) remote code execution on Management Interface (requires access to NSIP, CLIP, or SNIP with management
Atlassian has released software fixes to address four critical flaws in its software that, if successfully exploited, could result in remote code execution.
The list of vulnerabilities is below -
CVE-2022-1471 (CVSS score: 9.8) - Deserialization vulnerability in SnakeYAML library that can lead to remote code execution in multiple products
CVE-2023-22522 (CVSS score
Cybersecurity researchers have discovered a stealthy backdoor named Effluence that's deployed following the successful exploitation of a recently disclosed security flaw in Atlassian Confluence Data Center and Server.
"The malware acts as a persistent backdoor and is not remediated by applying patches to Confluence," Aon's Stroz Friedberg Incident Response Services said in an analysis published
Multiple ransomware groups have begun to actively exploit recently disclosed flaws in Atlassian Confluence and Apache ActiveMQ.
Cybersecurity firm Rapid7 said it observed the exploitation of CVE-2023-22518 and CVE-2023-22515 in multiple customer environments, some of which have been leveraged for the deployment of Cerber (aka C3RB3R) ransomware.
Both vulnerabilities are critical, allowing threat
Atlassian has warned of a critical security flaw in Confluence Data Center and Server that could result in "significant data loss if exploited by an unauthenticated attacker."
Tracked as CVE-2023-22518, the vulnerability is rated 9.1 out of a maximum of 10 on the CVSS scoring system. It has been described as an instance of "improper authorization vulnerability."
All versions of Confluence Data
Microsoft has linked the exploitation of a recently disclosed critical flaw in Atlassian Confluence Data Center and Server to a nation-state actor it tracks as Storm-0062 (aka DarkShadow or Oro0lxy).
The tech giant's threat intelligence team said it observed in-the-wild abuse of the vulnerability since September 14, 2023.
"CVE-2023-22515 is a critical privilege escalation vulnerability in
Atlassian has released fixes to contain an actively exploited critical zero-day flaw impacting publicly accessible Confluence Data Center and Server instances.
The vulnerability, tracked as CVE-2023-22515, is remotely exploitable and allows external attackers to create unauthorized Confluence administrator accounts and access Confluence servers.
It does not impact Confluence versions prior to
Atlassian and the Internet Systems Consortium (ISC) have disclosed several security flaws impacting their products that could be exploited to achieve denial-of-service (DoS) and remote code execution.
The Australian software services provider said that the four high-severity flaws were fixed in new versions shipped last month. This includes -
CVE-2022-25647 (CVSS score: 7.5) - A deserialization
Atlassian has released updates to address three security flaws impacting its Confluence Server, Data Center, and Bamboo Data Center products that, if successfully exploited, could result in remote code execution on susceptible systems.
The list of the flaws is below -
CVE-2023-22505 (CVSS score: 8.0) - RCE (Remote Code Execution) in Confluence Data Center and Server (Fixed in versions 8.3.2 and
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