CVE-2021-34646 in the critical feed json
Booster for WooCommerce <= 5.4.3 Authentication Bypass
published 2021-08-30 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21296
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 50.9%
- EPSS 50.9% chance of exploitation in 30 days, percentile 98%
- public exploits
- 1
- Exploit-DB
Summary
Versions up to, and including, 5.4.3, of the Booster for WooCommerce WordPress plugin are vulnerable to authentication bypass via the process_email_verification function due to a random token generation weakness in the reset_and_mail_activation_link function found in the ~/includes/class-wcj-emails-verification.php file. This allows attackers to impersonate users and trigger an email address verification for arbitrary accounts, including administrative accounts, and automatically be logged in as that user, including any site administrators. This requires the Email Verification module to be active in the plugin and the Login User After Successful Verification setting to be enabled, which it is by default.
Patch / fix
Timeline
- Published
- First public exploit (EDB-50299)
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 18 mo ago
Exploit prediction
50.87% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-50299 WordPress Plugin WooCommerce Booster Plugin 5.4.3 - Authentication Bypass webapps, 2021-09-17
- wordfence.com https://www.wordfence.com/blog/2021/08/critical-authentication-bypass-vulnerability-patched-in-booster-for-woocommerce/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Pluggabl LLC Booster for WooCommcerce
Classification
- Weakness
- Technology feeds
References
-
plugins.trac.wordpress.org
/changeset?sfp_email=&sfph_mail=&reponame=&old=2581212%40woocommerce-jetpack&new=2581212%40woocommerce-jetpack
patch, third-party-advisory
-
wordfence.com
/blog/2021/08/critical-authentication-bypass-vulnerability-patched-in-booster-for-woocommerce/
exploit, third-party-advisory
Sources
- CVE List CVE-2021-34646
- NVD CVE-2021-34646
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.