CVE-2021-27200 json
In WoWonder 3.0.4, remote attackers can take over any account due to the weak cryptographic algorithm in recover.php.
published 2021-06-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13965
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.4%
- EPSS 3.4% chance of exploitation in 30 days, percentile 88%
- public exploits
- 0
- none known
Summary
In WoWonder 3.0.4, remote attackers can take over any account due to the weak cryptographic algorithm in recover.php. The code parameter is easily predicted from the time of day.
Exploit prediction
3.36% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- securityforeveryone.com https://securityforeveryone.com/blog/wowonder-0-day-vulnerability-cve-2021-27200 referenced PoC, tagged "exploit" by a source, unverified
- exploit-db.com https://www.exploit-db.com/exploits/49989 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| 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 |
Classification
- Weakness
-
- CWE-330 Use of Insufficiently Random Values
References
-
securityforeveryone.com
/blog/wowonder-0-day-vulnerability-cve-2021-27200
exploit, third-party-advisory
-
exploit-db.com
/exploits/49989
exploit, third-party-advisory, vdb-entry
-
wowonder.com
product
Sources
- CVE List CVE-2021-27200
- NVD CVE-2021-27200
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.