Unpatched Atlassian Confluence zero-day exploited, fix expected today (CVE-2022-26134)

A critical zero-day vulnerability in Atlassian Confluence Data Center and Server is under active exploitation, the software maker has warned on Thursday.

There is currently no fix available – though they are expected to be released today – and users of the popular enterprise collaboration solution are advised to either temporarily restrict access to Confluence Server and Data Center instances from the internet, or to disable them completely.

Atlassian has declined to share specific details about the nature of CVE-2022-26134 until a fix is ready – we only known that the vulnerability can be exploited by unauthenticated attackers to achieve remote code execution, and that it affects all supported versions of Confluence Server and Data Center and likely all unsupported ones.

During an incident response investigation, they found two internet-facing web servers running Atlassian Confluence Server software compromised via a JSP variant of the China Chopper webshell.

As noted previously, Atlassian advises users to restrict internet access to Confluence Server and Data Center or to disable them completely.

Security teams should also check whether organizations’ Atlassian Confluence installations have been compromised, and to help with that Volexity released IOCs and hunting rules.

Share this article on social media:

Subscribe to Our Newsletter!
Stay on top of cybersecurity risks, evolving threats and industry news.
This field is for validation purposes and should be left unchanged.

The Latest Cybersecurity News

From major cyberattacks, newly discovered critical vulnerabilities to recommended best practices, read it here first:

Tell us About your Needs
Get an Answer the Same Business Day

Got an urgent request? Call us at 1-877-805-7475 or Book a meeting.

What happens next:

A Vumetric expert will contact you to learn more about your cybersecurity needs and goals.

The project's scope will be defined (Target environment, deadlines, requirements, etc.)

A detailed quote including all-inclusive pricing and statement of work is sent to you.

This field is for validation purposes and should be left unchanged.


Everything You Need to Know

Gain confidence in your future cybersecurity assessments by learning to effectively plan, scope and execute projects.


Enter your Email Address

This field is for validation purposes and should be left unchanged.

* No free email provider (e.g: gmail.com, hotmail.com, etc.)

This site is registered on wpml.org as a development site. Switch to a production site key to remove this banner.