How severe is CVE-2021-27200?

CVE-2021-27200 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-27200 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27200?

CVE-2021-27200 affects Wowonder. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27200?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-27200 published?

CVE-2021-27200 was published on 2021-06-11 and last updated on 2026-06-17.

CVE-2021-27200

CVE-2021-27200 is a critical-severity vulnerability in Wowonder with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-330.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-330
Affected product: Wowonder
Published: 2021-06-11
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-27200?: 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.
How severe is CVE-2021-27200?: CVE-2021-27200 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-27200 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27200?: CVE-2021-27200 affects Wowonder. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27200?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-27200 published?: CVE-2021-27200 was published on 2021-06-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:wowonder:wowonder:3.0.4:*:*:*:*:*:*:*

More vulnerabilities in Wowonder

CVE-2022-42984 — Critical (CVSS 9.8): WoWonder Social Network Platform 4.1.4 was discovered to contain a SQL injection vulnerability via the offset parameter…
CVE-2022-40405 — High (CVSS 7.5): WoWonder Social Network Platform v4.1.2 was discovered to contain a SQL injection vulnerability via the offset…
CVE-2021-26935 — High (CVSS 7.5): In WoWonder < 3.1, remote attackers can gain access to the database by exploiting a requests.php?f=search-my-followers…
CVE-2022-1753 — Medium (CVSS 5.4): A vulnerability, which was classified as critical, was found in WoWonder. Affected is the file /requests.php which is…
CVE-2022-26254 — Medium (CVSS 5.3): WoWonder The Ultimate PHP Social Network Platform v4.0.0 was discovered to contain an access control issue which allows…

All CVEs affecting Wowonder →

Other CWE-330 (Use of Insufficiently Random Values) vulnerabilities

CVE-2023-22601 — Critical (CVSS 10.0): InHand Networks InRouter 302, prior to version IR302 V3.5.56, and InRouter 615, prior to version…
CVE-2026-25072 — Critical (CVSS 9.8): XikeStor SKS8310-8X Network Switch firmware versions 1.04.B07 and prior contain a predictable session identifier…
CVE-2026-27755 — Critical (CVSS 9.8): SODOLA SL902-SWTGW124AS firmware versions through 200.1.20 contain a weak session identifier generation vulnerability…
CVE-2026-27637 — Critical (CVSS 9.8): FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206,…
CVE-2025-64097 — Critical (CVSS 9.8): NervesHub is a web service that allows users to manage over-the-air (OTA) firmware updates of devices in the field. A…
CVE-2025-4607 — Critical (CVSS 9.8): The PSW Front-end Login & Registration plugin for WordPress is vulnerable to Privilege Escalation in all versions up…

Browse all CWE-330 (Use of Insufficiently Random Values) vulnerabilities →