FlyCms counter endpoint missing authorization lets users edit others' content
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
FlyCms through commit edfdf724 has a missing authorization flaw in ActionService.counter() that lets users change content rows they do not own. Any registered user can send requests to the counter endpoint and add arbitrary deltas to numeric fields such as price, stock, or points, because checkRowOwner never verifies ownership. The weakness is classified as CWE-639.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
FlyCms through commit edfdf724 contains a missing authorization vulnerability in ActionService.counter() that allows authenticated users to modify other users' content rows because checkRowOwner never verifies ownership. Any registered user can send requests to /ucenter/action/{modelCode}/{id}/counter or /ucenter/action/compose to add arbitrary deltas to numeric fields like price, stock, or points.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
No affected products listed by the sources yet.
Remediation
The sources list no fixed version for FlyCms.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Timeline
- 2026-10-19 Threatist record created from CVE-2026-112294
- 2026-10-19 Alias added: GHSA-v455-8jmh-chm4
- 2026-10-20 CISA SSVC decision points changed
References
Other 3
- https://github.com/sunkaifei/FlyCms/issues/19
- https://github.com/sunkaifei/FlyCms/blob/edfdf724c3b944310f60c29aa755d03a00a75837/backend/src/main/java/com/flycms/module/model/service/ActionService.java
- https://github.com/sunkaifei/FlyCms/blob/edfdf724c3b944310f60c29aa755d03a00a75837/backend/src/main/java/com/flycms/web/front/ActionController.java
More sunkaifei vulnerabilities
- TI-2024-15191 Cross Site Request Forgery vulnerability in FlyCms v.1.0 allows a remote attacker to… CVSS 3.1HIGH 8.8
- TI-2025-13772 sunkaifei FlyCMS User Login UserController.java userLogin cross site scripting CVSS 4.0MEDIUM 5.3
- TI-2025-13771 sunkaifei FlyCMS Admin Login IndexAdminController.java cross site scripting CVSS 4.0MEDIUM 5.3
- TI-2026-76496 Default super administrator credentials in FlyCms CVSS 4.0CRITICAL 9.3
- TI-2026-76495 Mass assignment in FlyCms lets users overwrite protected account data CVSS 4.0MEDIUM 5.3
Sources
- CVE-2026-112294 · CVE Program
- CVE-2026-112294 · NVD
- FIRST EPSS
- GHSA-v455-8jmh-chm4 · GitHub Advisory Database · CC BY 4.0
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