CVE-2025-54376
published 2025-09-10CVE-2025-54376: Hoverfly is an open source API simulation tool. In versions 1.11.3 and prior, Hoverfly’s admin WebSocket endpoint /api/v2/ws/logs is not protected by the same…
PriorityP351high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.66%
47.1th percentile
Hoverfly is an open source API simulation tool. In versions 1.11.3 and prior, Hoverfly’s admin WebSocket endpoint /api/v2/ws/logs is not protected by the same authentication middleware that guards the REST admin API. Consequently, an unauthenticated remote attacker can stream real-time application logs (information disclosure) and/or gain insight into internal file paths, request/response bodies, and other potentially sensitive data emitted in logs. Version 1.12.0 contains a fix for the issue.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | spectolabs_hoverfly | >= 0 < 1.12.0 | 1.12.0 |
| hoverfly | hoverfly | < 1.12.0 | 1.12.0 |
| spectolabs | hoverfly | < 1.12.0 | 1.12.0 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv4.07.8HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
OSV
WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled in github.com/SpectoLabs/hoverfly
osv·2025-09-17
CVE-2025-54376 WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled in github.com/SpectoLabs/hoverfly
WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled in github.com/SpectoLabs/hoverfly
WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled in github.com/SpectoLabs/hoverfly
GHSA
WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled
ghsa·2025-09-10
CVE-2025-54376 [HIGH] CWE-200 WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled
WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled
### Summary
Hoverfly’s admin WebSocket endpoint /api/v2/ws/logs is not protected by the same authentication middleware that guards the REST admin API.
Consequently, an unauthenticated remote attacker can:
- Stream real-time application logs (information disclosure).
- Gain insight into internal file paths, request/response bodies, and other potentially sensitive data emitted in logs.
### PoC
1. Start Hoverfly with authentication enabled:
```
./hoverfly -auth
```
2. Confirm REST API requires credentials:
```
curl -i http://localhost:8888/api/v2/hoverfly/version
```
3. Connect to the WebSocket endpoint without credentials:
```
wscat -c ws://localhost:8888/api/v2/ws/logs
# Connected (pre
OSV
WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled
osv·2025-09-10
CVE-2025-54376 [HIGH] WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled
WebSocket endpoint `/api/v2/ws/logs` reachable without authentication even when --auth is enabled
### Summary
Hoverfly’s admin WebSocket endpoint /api/v2/ws/logs is not protected by the same authentication middleware that guards the REST admin API.
Consequently, an unauthenticated remote attacker can:
- Stream real-time application logs (information disclosure).
- Gain insight into internal file paths, request/response bodies, and other potentially sensitive data emitted in logs.
### PoC
1. Start Hoverfly with authentication enabled:
```
./hoverfly -auth
```
2. Confirm REST API requires credentials:
```
curl -i http://localhost:8888/api/v2/hoverfly/version
```
3. Connect to the WebSocket endpoint without credentials:
```
wscat -c ws://localhost:8888/api/v2/ws/logs
# Connected (pre
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-09-10
Published