Vulnerability in Phoenixthrush Aniworld Downloader
CVE-2026-108580
AniWorld Downloader before 5.3.0 contains an improper restriction of authentication attempts vulnerability in the WebUI /login POST handler that allows unauthenticated attackers to guess passwords without throttling. Attackers can enumerate usernames through verify_user response timing and brute-force passwords on exposed WebUI instances to take over accounts.
Published .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/phoenixthrush/AniWorld-Downloader/issues/334 (issue-tracking)
- github.com/phoenixthrush/AniWorld-Downloader/commit/3c070bd10665377308a3092e119… (patch)
- github.com/phoenixthrush/AniWorld-Downloader/releases/tag/v.5.3.0 (release-notes)
- hackmd.io/@haind/aniworld-login-brute-force (third-party-advisory)
- github.com/phoenixthrush/AniWorld-Downloader/blob/bb13599d17937fdb4df2df699024b… (technical-description)
- www.vulncheck.com/advisories/aniworld-downloader-before-5.3.0-webui-login-brute… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-108580?
- CVE-2026-108580 is a medium-severity vulnerability in Phoenixthrush Aniworld Downloader, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 6.5/10. Published 2026-10-10.
- How severe is CVE-2026-108580?
- Medium severity. CVSS v3 base score is 6.5 out of 10.