How severe is CVE-2021-22847?

CVE-2021-22847 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-22847 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22847?

CVE-2021-22847 affects Hyweb Hycms-j1. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22847?

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

When was CVE-2021-22847 published?

CVE-2021-22847 was published on 2021-01-22 and last updated on 2026-06-17.

CVE-2021-22847

CVE-2021-22847 is a high-severity vulnerability in Hyweb Hycms-j1 with a CVSS 3.x base score of 8.8. 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-89.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Hyweb Hycms-j1
Published: 2021-01-22
Last modified: 2026-06-17

Description

Hyweb HyCMS-J1's API fail to filter POST request parameters. Remote attackers can inject SQL syntax and execute commands without privilege.

Frequently asked questions

What is CVE-2021-22847?: Hyweb HyCMS-J1's API fail to filter POST request parameters. Remote attackers can inject SQL syntax and execute commands without privilege.
How severe is CVE-2021-22847?: CVE-2021-22847 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-22847 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22847?: CVE-2021-22847 affects Hyweb Hycms-j1. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22847?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-22847 published?: CVE-2021-22847 was published on 2021-01-22 and last updated on 2026-06-17.

References

https://www.twcert.org.tw/tw/cp-132-4316-298fc-1.html

Affected products (1)

cpe:2.3:a:hyweb:hycms-j1:*:*:*:*:*:*:*:*

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