CVE-2026-40935

Katalog CVE

CVSS 5.3 · Medium EPSS 0,32%

Kerentanan Guessable CAPTCHA pada wwbn avideo. Skor CVSS 3.1 5.3 (Medium) menurut github.com.

Deskripsi (NVD)

WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/getCaptcha.php` accepts the CAPTCHA length (`ql`) directly from the query string with no clamping or sanitization, letting any unauthenticated client force the server to generate a 1-character CAPTCHA word. Combined with a case-insensitive `strcasecmp` comparison over a ~33-character alphabet and the fact that failed validations do NOT consume the stored session token, an attacker can trivially brute-force the CAPTCHA on any endpoint that relies on `Captcha::validation()` (user registration, password recovery, contact form, etc.) in at most ~33 requests per session. Commit bf1c76989e6a9054be4f0eb009d68f0f2464b453 contains a fix.

Rincian

Terbit di NVD

21 April 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

5.3 (Medium), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-804: Guessable CAPTCHA

EPSS (30 hari)

0,32% peluang dieksploitasi; lebih tinggi dari 22,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/WWBN/AVideo/security/advisories/GHSA-hg7g-56h5-5pqr exploit · mitigasi · advisory vendor
• https://github.com/WWBN/AVideo/commit/bf1c76989e6a9054be4f0eb009d68f0f2464b453 patch