Summary
Byobu user preference to prevent private discussions being started are not respected
Workarounds
There are no workarounds for this issue.
Impact
Users electing to prevent others starting private discussions with themselves.
Please note that admins and others with appropriate permissions can always bypass this preference, as was the case before.
The application assigns, modifies, tracks, or checks privileges incorrectly, allowing a user to gain elevated access. Typical impact: privilege escalation beyond the intended level.
CVE-2022-35921 has a CVSS score of 3.5 (Low). The vector is network-reachable, low privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1.1.7); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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See it in your environmentNew to Kodem? Get a demo →Remediation advice
Users of Byobu should update the extension to version 1.1.7, where this has been patched. This version is only supported on v1.2.0 and later of Flarum Core.
Users of Byobu with Flarum 1.0 or 1.1 should upgrade to Flarum 1.2 or later, or evaluate the impact this issue has on your forum's users and choose to disable the extension if needed.
Frequently Asked Questions
- What is CVE-2022-35921? CVE-2022-35921 is a low-severity improper privilege management vulnerability in fof/byobu (composer), affecting versions >= 0.3.0-beta.2, < 1.1.7. It is fixed in 1.1.7. The application assigns, modifies, tracks, or checks privileges incorrectly, allowing a user to gain elevated access.
- How severe is CVE-2022-35921? CVE-2022-35921 has a CVSS score of 3.5 (Low). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of fof/byobu are affected by CVE-2022-35921? fof/byobu (composer) versions >= 0.3.0-beta.2, < 1.1.7 is affected.
- Is there a fix for CVE-2022-35921? Yes. CVE-2022-35921 is fixed in 1.1.7. Upgrade to this version or later.
- Is CVE-2022-35921 exploitable, and should I be worried? Whether CVE-2022-35921 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2022-35921 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2022-35921? Upgrade
fof/byobuto 1.1.7 or later.