Dashboard / CVE-2026-123204

CVE-2026-123204

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 61/100
Published: 2026-11-05 Modified: 2026-11-12 First seen: 2026-11-05 Status: active

Attack Surface

Network Low Complexity No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: X
AT: None
VC: None
VI: None
VA: None

Description

Posta before v0.18.0 contains a server-side request forgery vulnerability that allows authenticated users with edit rights to make the backend send POST requests to internal destinations by creating webhooks with arbitrary URLs. Attackers can target loopback, private-network or cloud metadata addresses and read delivery status codes and error strings to probe internal hosts and ports.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
goposta posta 0 < v0.18.0
goposta posta 0 < v0.18.0

References & Advisories (6)

Bug Bounty Relevance

61 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

5.3 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/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

EPSS — Exploitation Probability

0.30%
Raw Score 0.003020
Percentile 23.2%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00302
2026-11-13
0.00302
2026-11-12
0.00302
2026-11-10
0.00302
2026-11-09
0.00302
2026-11-08
0.00302
2026-11-07
0.00302
2026-11-06
0.00302

Intelligence Sources

mitre ref →
nvd ref →

External Links