CitrixBleed 2: When Your Network’s Worst Nightmare Gets a Sequel!
CitrixBleed 2, tracked as CVE-2025-5777, is a critical vulnerability in Citrix NetScaler devices with a CVSS score of 9.3. Researchers from WatchTowr have published a detection script to help identify exploitation, aiming to ensure defenders, not just attackers, can pinpoint vulnerable appliances.
Hot Take:
Looks like Citrix’s NetScaler is bleeding more than your average nosebleed, and attackers are taking advantage of this flaw faster than you can say “multifactor authentication bypass!” It’s like the cybersecurity version of a leaky faucet that just won’t stop dripping, and the folks at WatchTowr are here with the virtual wrench to help plug the leak. Who knew patching could be this suspenseful?
Key Points:
- CitrixBleed 2, aka CVE-2025-5777, is a critical vulnerability in Citrix NetScaler ADC and Gateway devices.
- This flaw allows attackers to bypass authentication, including MFA, and hijack user sessions.
- WatchTowr published a detection script to help identify the exploitation of this vulnerability.
- The vulnerability was disclosed alongside another flaw, CVE-2025-5349, on June 17.
- Despite the risks, WatchTowr initially held back on technical details due to a high number of unpatched devices.
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