How severe is CVE-2021-42967?

CVE-2021-42967 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-2021-42967 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-42967?

CVE-2021-42967 affects Xxyopen Novel-plus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-42967?

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-2021-42967 published?

CVE-2021-42967 was published on 2022-05-13 and last updated on 2026-06-17.

CVE-2021-42967

CVE-2021-42967 is a critical-severity vulnerability in Xxyopen Novel-plus 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Xxyopen Novel-plus
Published: 2022-05-13
Last modified: 2026-06-17

Description

Unrestricted file upload in /novel-admin/src/main/java/com/java2nb/common/controller/FileController.java in novel-plus all versions allows allows an attacker to upload malicious JSP files.

Frequently asked questions

What is CVE-2021-42967?: Unrestricted file upload in /novel-admin/src/main/java/com/java2nb/common/controller/FileController.java in novel-plus all versions allows allows an attacker to upload malicious JSP files.
How severe is CVE-2021-42967?: CVE-2021-42967 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-2021-42967 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-42967?: CVE-2021-42967 affects Xxyopen Novel-plus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-42967?: 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-2021-42967 published?: CVE-2021-42967 was published on 2022-05-13 and last updated on 2026-06-17.

References

https://github.com/201206030/novel-plus/issues/62

Affected products (1)

cpe:2.3:a:xxyopen:novel-plus:-:*:*:*:*:*:*:*

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