---
id: "CVE-2026-129144"
page: "https://infrastack.ai/live/CVE-2026-129144"
kind: "vulnerability"
aliases: ["CVE-2026-129144"]
title: "paicoding: weak payment codes let users unlock paid articles free"
severity: "medium"
cvss: 5.4
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["java", "other", "paicoding", "self-hosted"]
not_affected_if: ["no-paid-content", "other-version"]
published_at: "2026-11-13T18:17:39+00:00"
first_seen_at: "2026-11-13T18:49:30+00:00"
updated_at: "2026-11-13T18:51:54+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-129144", "first_seen_at": "2026-11-13T18:49:30+00:00"}]
exploit_sources: []
---

# paicoding: weak payment codes let users unlock paid articles free

Link for people: https://infrastack.ai/live/CVE-2026-129144 (this .md is for agents)

paicoding 1.0.3, a Java forum and content platform, generates payment confirmation codes from a small counter. An authenticated attacker can guess a valid code and mark their own payment as paid, unlocking paywalled articles.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the paicoding version in the project's pom.xml or deployment: `1.0.3` is affected per the advisory
- Review the payment callback code path that compares verifyCode against IdUtil.genPayCode output

## Timeline

- 2026-11-13T18:49:30+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-129144

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/paicoding-1.0.3-payment-bypass-via-guessable-codes-in-article-api-pay-callback

## From the sources

paicoding 1.0.3 contains a payment bypass vulnerability that allows authenticated attackers to unlock paid articles by guessing weak payment confirmation codes. Attackers can start a payment, enumerate roughly 2000 IdUtil.genPayCode counter values, and submit the matching verifyCode to the unauthenticated callback to mark it paid.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_