CVE-2026-4208 is a high-severity vulnerability in the TYPO3 "E-Mail MFA Provider" extension, allowing an authenticated attacker to bypass multi-factor authentication by providing an empty string after an initial successful login due to an improper MFA code reset. With a CVSSv4 score of 7.7 (High), this flaw has a network attack vector but high attack complexity, requiring low privileges to achieve high impacts on confidentiality, integrity, and availability. While there is no public exploit code available and it is not yet in CISA's KEV catalog, the vulnerability is on an active hot list and has garnered community attention, with recommendations to patch or disable the affected extension.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.0.7CPE matchmatch criteria | cpe:2.3:a:mrsilaz:mfa_mail:*:*:*:*:*:typo3:*:* | ||
2.0.0CPE matchmatch criteria | cpe:2.3:a:mrsilaz:mfa_mail:2.0.0:*:*:*:*:typo3:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.