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GHSA-mr8g-2mj4-pcq2
No affected components available
Impact
POST /two-factor had no rate limiting, lockout, or attempt counter. An attacker with valid credentials can submit unlimited TOTP guesses. The TOTP implementation accepts the current code plus one step on either side (config/google2fa.php window=1), so at any instant 3 of 1,000,000 codes are accepted.
After a correct guess the attacker holds a fully authenticated session. If the instance is configured with 2FA in optional mode (two_factor_enabled='1'), the attacker can additionally disable 2FA via POST /account/profile with two_factor_optin=0. No OTP re-verification is required. The account is then accessible with the password alone on future logins. If 2FA is in required-for-all mode (='2'), the per-user opt-out path is closed and the impact stops at session-level account takeover. For an admin target, POST /api/v1/users/two_factor_reset additionally clears another user's 2FA secret.
Patches
Patched in v8.6.0
The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a low impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
- CVE-2026-49870Alias
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