Missing authentication in BillaBear installation handler
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.
Summary
The source description places BillaBear up to 2025.01.03 as affected in its installation handler. The processInstall function in src/BillaBear/Controller/InstallController.php lacks authentication (CWE-306). A remote attacker can reach this function without logging in. A public exploit has been disclosed and is linked in the references.
Written with Claude Haiku 5.5 from the sources below · 2026-10-31
Description from the CNA
A vulnerability was determined in BillaBear up to 2025.01.03. Affected by this issue is the function processInstall of the file src/BillaBear/Controller/InstallController.php of the component Installation Handler. This manipulation causes missing authentication. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | BillaBear | 2025.01.03 | — | No fix listed | CNA |
- BillaBear Vendor— Affected 2025.01.03 Fixed in — No fix listed CNA
CPE names CNA · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:billabear:billabear:*:*:*:*:*:*:*:* | — | — | — |
- cpe:2.3:a:billabear:billabear:*:*:*:*:*:*:*:* Versions — — ·—
Remediation
The sources list no fixed version for BillaBear.
Written with Claude Haiku 5.5 from the sources below · 2026-10-31
Timeline
- 2026-10-26 Threatist record created from CVE-2026-116257
- 2026-10-27 Alias added: GHSA-w52v-5242-fjcm
- 2026-10-27 Priority changed: MEDIUM → LOW
- 2026-10-30 EPSS moved to the 50th–90th percentile
- 2026-10-31 CISA SSVC decision points changed
- 2026-10-31 Priority changed: LOW → HIGH
Sources
- CVE-2026-116257 · CVE Program
- CVE-2026-116257 · NVD
- FIRST EPSS
- GHSA-w52v-5242-fjcm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences