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Atlassian disclosed a critical vulnerability last week related to Remote Code Execution (CVE-2023-22527). This particular vulnerability was reported to be affecting Confluence Data Center and Server versions released earlier than December 5, 2023.
Moreover, Atlassian also stated that the vulnerability was patched in the latest Confluence data center and server 8.5.4 (LTS) and 8.6.0 & 8.7.1 (Data Centers only). Moreover, version 8.5.4 also specified that it does not receive backported fixes due to the Security Bug fix policy.
CVE-2023-22527 allows an unauthenticated threat actor to execute remote commands on the affected installations. Moreover, this was a template injection vulnerability currently being exploited by threat actors.
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600 Unique IPs
According to the reports shared with Cyber Security News, more than 600 IPs were observed attacking Atlassian Confluence with this vulnerability. Most of the attempts were attempts to do a callback with the “whoami” command execution.
As for the originating IPs, most of them were traced back to Russia. Other commands used in the exploitation attempts were “id” and “cat /etc/shadow.” Atlassian urges all the users of Confluence servers to upgrade to the latest versions as soon as possible.
Nevertheless, Atlassian mentioned that there are no workarounds for mitigating this vulnerability. GreyNoise also stated that they were seeing high attempts of exploitation from different IPs and asked them to update the vulnerable versions as soon as possible.
The security bug fix policy that affected version 8.5.4 from receiving backported support states that “…critical security bug fixes will be backported. We will release new maintenance releases for the versions covered by the policy instead of binary patches. Binary patches are no longer released.“
Affected Products and Fixed in Version
| Product | Fixed Versions | Latest Versions |
| Confluence Data Center and Server | 8.5.4 (LTS) | 8.5.5 (LTS) |
| Confluence Data Center | 8.6.0 (Data Center Only)8.7.1 (Data Center Only) | 8.7.2 (Data Center Only) |
Atlassian has released a report that provides additional information about the vulnerability. It is recommended that all the users upgrade to the latest version to prevent exploitation.
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