CVE-2026-33731

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Source
https://cve.org/CVERecord?id=CVE-2026-33731
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33731.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33731
Aliases
Published
2026-07-16T20:46:53.407Z
Modified
2026-08-04T11:50:50.951977427Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
AVideo has an Authorize.Net Webhook Signature Bypass that Enables Wallet Balance Inflation via Forged Payment Data
Details

WWBN AVideo is an open source video platform. In versions prior to 29.0, the Authorize.Net webhook handler at plugin/AuthorizeNet/webhook.php contains a signature verification bypass that allows an attacker to forge webhook requests with arbitrary payment amounts and target user IDs. By supplying a valid transaction ID from a small legitimate purchase, the attacker bypasses signature validation and credits arbitrary wallet balances to any user account via attacker-controlled payload fields. Three flaws combine into an exploit chain: signature bypass via OR logic (webhook.php:33), payload values override API-fetched values (AuthorizeNet.php:169-171, webhook.php:44-48) and a missing approval check (webhook.php:61-75). By forging payment metadata, an attacker can credit arbitrary amounts to any user's wallet without a corresponding payment and include a  plans_id  to activate premium subscriptions (webhook.php:86-134), enabling free access to all paid and premium content and causing direct revenue loss to the platform owner. This issue has been fixed in version 29.0.

Database specific 
{
    "cwe_ids": [
        "CWE-345"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33731.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/wwbn/avideo

Affected ranges

Type
GIT
Repo
https://github.com/wwbn/avideo
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
2386f39caea1d2ef36267b252fa76af283294623
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "29.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

10.*
10.8
Other
11
11.*
11.1
11.1.1
11.5
11.6
12.*
12.4
14.*
14.3
14.3.1
18.*
18.0
2.*
2.2
2.7
21.*
21.0
22.*
22.0
24.*
24.0
25.*
25.0
26.*
26.0
3.*
3.4
4.*
4.0
7.*
7.2
7.3
7.4
7.6
7.7
7.8
8.*
8.1
8.5
8.6
8.7
8.9
8.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33731.json"