Security readout for executives and security teams
Plain-English summary
A flaw in ClipBucket V5’s web installer can let an unauthenticated internet user run operating-system commands under the web server account. Successful compromise could expose or alter data and disrupt the service. Risk is greatest where the installer remains reachable.
Executive priority
Treat internet-accessible installations as an immediate remediation priority. Restrict the installer now, determine exact versions, investigate relevant logs, and deploy the vendor correction. Internally isolated systems still require prompt review because compromise would grant command execution under the web server identity.
Technical view
The installer passes the php_cli_filepath POST parameter into shell execution without adequate validation or escaping, creating CWE-78 command injection. The supplied advisory identifies versions 5.5.1 through 5.5.3-#153, although the bundle’s structured affected record lists only 5.5.1 and reports a conflicting default status.
Likely exposure
Prioritize ClipBucket V5 deployments running the identified versions where installation endpoints remain present and network-accessible. Exposure cannot be determined from version alone because installer reachability, deployment configuration, and the source bundle’s inconsistent affected-version metadata require local verification.
Exploitation context
The CVSS 3.1 score is 9.8: network-accessible, low complexity, no privileges, and no user interaction, with high confidentiality, integrity, and availability impact. The bundle says KEV is false and provides no evidence of active exploitation. Public technical details and a patch reference increase defensive urgency.
Researcher notes
The vulnerable flow is documented in installer and system-class source references, with a specific remediation commit supplied. However, the bundle conflicts on affected versions: its title and advisory span 5.5.1 through 5.5.3-#153, while structured data names only 5.5.1 with defaultStatus “unaffected.” Confirm scope against current vendor records.
Mitigation direction
- Apply the vendor patch commit or a vendor-confirmed fixed release after testing.
- Remove or restrict network access to the installer when installation is complete.
- Use least privilege for the web server account to limit command-execution impact.
- Check current vendor guidance for definitive affected and fixed version information.
Validation and detection
- Inventory ClipBucket V5 deployments and record their exact versions and revisions.
- Confirm whether installer files and routes are reachable without authentication.
- Review installer POST logs for suspicious php_cli_filepath values or unusual request patterns.
- Review web server process activity and host telemetry for unexpected child processes.
- Verify the patch’s validation changes are present without testing malicious payloads.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-80138 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
9.2CriticalVector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/MacWarrior/clipbucket-v5CVE reference, VulnCheck · product
- https://github.com/MacWarrior/clipbucket-v5/commit/36e7c6cfd81f62a091d2aeef96a8fc2fc2d85dc4CVE reference, VulnCheck · patch
- https://github.com/MacWarrior/clipbucket-v5/blob/5.5.3-%23153/upload/includes/classes/system.class.phpCVE reference, VulnCheck · technical-description
- https://github.com/MacWarrior/clipbucket-v5/blob/5.5.3-%23153/upload/cb_install/functions_install.phpCVE reference, VulnCheck · technical-description
- VulnCheck Advisory: ClipBucket V5 5.5.1 through 5.5.3-#153 OS Command Injection via Installer php_cli_filepath ParameterCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.