CVE-2026-129144
paicoding 1.0.3 Payment Bypass via Guessable Codes in /article/api/pay/callback
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-334 |
| Vendor | itwanger |
| Product | paicoding |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
itwanger / paicoding
1.0.3
References
vul.yulun.ac.cn: https://vul.yulun.ac.cn/20261112/paicoding/ github.com: https://github.com/itwanger/paicoding/issues/137 github.com: https://github.com/itwanger/paicoding/blob/903adce70309d340f7eec51ec3c80cfe3c8326c1/paicoding-core/src/main/java/com/github/paicoding/forum/core/util/id/IdUtil.java#L54-L61 github.com: https://github.com/itwanger/paicoding/blob/903adce70309d340f7eec51ec3c80cfe3c8326c1/paicoding-web/src/main/java/com/github/paicoding/forum/web/front/article/rest/ArticlePayRestController.java#L79-L90 vulncheck.com: https://www.vulncheck.com/advisories/paicoding-1.0.3-payment-bypass-via-guessable-codes-in-article-api-pay-callback
Credits
Wu Yulun