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VulnerabilityPublished Updated

CVE-2025-55469: youlai-boot · Improper Access Control

Affects youlai-bootSource CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Nov 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
GitHubyoulaiorg/youlai-bootpkg:github/youlaiorg/youlai-bootOther threatsAffected
  • =2.21.1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Given the absence of an official patch, European organizations should implement immediate compensating controls. These include isolating devices running youlai-boot v2.21.1 from untrusted networks, enforcing strict network segmentation to limit access to administrative interfaces, and deploying intrusion detection/prevention systems (IDS/IPS) to monitor for suspicious activity targeting the bootloader or administrative endpoints. Organizations should conduct thorough asset inventories to identify all devices running the affected version and prioritize them for remediation. Applying strict access control policies at the network level, such as VPNs with multi-factor authentication for administrative access, can reduce exposure. Regularly monitoring logs for unauthorized access attempts and anomalous behavior is critical. Once a patch becomes available, organizations must prioritize rapid deployment. Additionally, vendors and integrators should be engaged to provide updates or guidance on secure configurations. Incident response plans should be updated to address potential exploitation scenarios related to this vulnerability.

Description

Incorrect access control in youlai-boot v2.21.1 allows attackers to escalate privileges and access the Administrator backend.

References

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