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CVE-2021-27200

31
FAUCET Score

CVE-2021-27200 describes a critical vulnerability in WoWonder 3.0.4, allowing remote attackers to fully compromise any user account. This is due to a weak cryptographic algorithm in recover.php, where the "code" parameter is easily predictable based on the time of day. With a CVSS score of 9.8 (CRITICAL), this vulnerability has a network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its severity, there is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), nor is it listed on the CISA KEV catalog, and it has received no community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.4CPE matchmatch criteria
cpe:2.3:a:wowonder:wowonder:3.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.36%
Probability of exploitation in next 30 days
EPSS Percentile
87.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0336 is in the 80th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

securityforeveryone.com / blog/wowonder-0-day-vulnerability-cve-2021-27200
ExploitThird Party Advisory
exploit-db.com / exploits/49989
ExploitThird Party AdvisoryVDB Entry
wowonder.com
Product