Vulnerability · Published Oct 16, 2025 · Assigned by GitHub_M

CVE-2025-62428Drawing-Captcha APP Host Header Injection in `/register` and `/confirm-email` Endpoints

High 8.8

In plain English

A high-severity open redirect in Drawing-Captcha-APP from Drawing-Captcha. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).

Severity (CVSS 4.0)8.8High

Exploit odds (30 days)0.5%top 55.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Drawing-Captcha APP provides interactive, engaging verification for Web-Based Applications. The vulnerability is a Host Header Injection in the /register and /confirm-email endpoints. It allows an attacker to manipulate the Host header in HTTP requests to generate malicious email confirmation links. These links can redirect users to attacker-controlled domains. This vulnerability affects all users relying on email confirmation for account registration or verification. This vulnerability is fixed in 1.2.5-alpha-patch.

Affected products (as reported)

Vendor	Product	Versions
Drawing-Captcha	Drawing-Captcha-APP	< 1.2.5-alpha-patch

Weakness: CWE-601 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

References

https://github.com/Drawing-Captcha/Drawing-Captcha-APP/security/advisories/GHSA-5pj8-fc6g-vv7m x_refsource_CONFIRM
https://github.com/Drawing-Captcha/Drawing-Captcha-APP/issues/30 x_refsource_MISC