CitrixBleed 2: A Comedy of Errors in Cybersecurity Transparency
CitrixBleed 2, a critical vulnerability in Citrix NetScaler, was exploited weeks before Citrix admitted attacks. GreyNoise revealed targeted exploitation from China, while Citrix faced criticism for its slow response and lack of transparency. Despite patches, Citrix’s own defenses failed to detect exploitation attempts. The urgency to upgrade remains high.
Hot Take:
CitrixBleed 2 is like finding out your favorite character in a series has been a spy all along – only this time, the plot twist came too late, and the villains have already ransacked the pantry. Citrix, how about we try being proactive next time?
Key Points:
- Citrix NetScaler vulnerability CVE-2025-5777, known as CitrixBleed 2, was exploited before public PoC release.
- GreyNoise detected Chinese IP addresses exploiting the vulnerability on June 23, 2025.
- Citrix’s response was criticized for a lack of transparency and not acknowledging active exploitation.
- Kevin Beaumont highlighted signs of exploitation, including odd log entries and hijacked sessions.
- Patches are available, but no mitigation exists beyond upgrading to newer software versions.
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