Description
Ech0 before 4.7.3 contains an authentication bypass vulnerability in the PUT /api/echo/like/:id endpoint that allows unauthenticated attackers to increment engagement metrics without identity verification or rate limiting. Attackers can send repeated requests to arbitrarily inflate the fav_count field for any known echo identifier, compromising the integrity of engagement metrics and social ranking systems.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| lin-snow | Ech0 | < 4.7.3 | 4.7.3 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/lin-snow/ech0 | < 1.4.8-0.20260503040728-a7e8b8e84bd1 | 1.4.8-0.20260503040728-a7e8b8e84bd1 | GHSA-rgj7-vg8v-j4wr |
References
- GitHub Security Advisory (GHSA-rgj7-vg8v-j4wr) vendor-advisory
- VulnCheck Advisory: Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation third-party-advisory