DEF CON — Varonis Threat Labs has disclosed a one-click vulnerability in Rovo, Atlassian’s enterprise AI assistant, that let a specially crafted link seed attacker-controlled instructions directly into a user’s live AI session.
Dubbed RovoBlast, the flaw required no jailbreak and no permission bypass, relying on the fact that the assistant simply treated externally supplied parameters as trusted input.
Rovo functions as an AI layer spanning Jira, Confluence, Bitbucket, and third-party tools such as Slack, Microsoft 365, and Google Workspace. It also carries autonomous agent features capable of completing multi-step tasks with no further user involvement, which is what enabled the RovoBlast attack.
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The exploit leveraged a URL parameter called rovoChatPrompt, which pre-fills content straight into Rovo’s chat window. Varonis researchers describe this attack path as parameter-to-prompt (P2P) injection, which they previously reported in Microsoft Copilot as Reprompt in January.
Researchers noticed that the organization ID part of the URL could be left blank and Atlassian would still route the request into the victim’s own default organization, all without any warning or indicator that the session had been seeded by an outside source.
To gauge the potential blast radius, the researchers simply asked Rovo what data it could see. The AI’s answer included Jira, Confluence, Bitbucket, Slack, Google Workspace, Microsoft 365, relational databases, uploaded files, web pages, and archived content.
The actual leakage came from ResearchAgent, one of Rovo’s built-in tools, which can autonomously conduct multi-source web research and navigate across arbitrary sites. Once an attacker’s prompt was seeded through the malicious link, that same capability let Rovo pull internal data and push it out to the open web in a single automated chain.
The team demonstrated the technique in three separate proof-of-concept scenarios: exfiltrating Confluence pages, Jira tickets, and SharePoint content containing personal data.
Notably, the researchers found that a single seeded link was generally enough to trigger the leak. The attack didn’t require chaining multiple requests or any additional bypass steps to get Rovo to retrieve and summarize sensitive data.
Varonis disclosed RovoBlast to Atlassian, which fixed the issue before the findings were published.
The researchers recommend that organizations limit which systems Rovo can reach, disconnect unused integrations, wall off sensitive areas such as legal, HR, and finance, disable browsing or multistep automation features that aren’t in active use, and pair this with routine monitoring of assistant activity logs.
Varonis presented the research at DEF CON 34 on Friday. A technical write-up is available on the Varonis blog.
*statement from Atlassian removed at Atlassian’s request
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