How severe is CVE-2021-4271?

CVE-2021-4271 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-4271 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-4271?

CVE-2021-4271 affects W2wiki Project W2wiki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-4271?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-4271 published?

CVE-2021-4271 was published on 2022-12-21 and last updated on 2026-06-17.

CVE-2021-4271

CVE-2021-4271 is a low-severity vulnerability in W2wiki Project W2wiki with a CVSS 3.x base score of 3.5. 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-79.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: W2wiki Project W2wiki
Published: 2022-12-21
Last modified: 2026-06-17

Description

A vulnerability was found in panicsteve w2wiki. It has been rated as problematic. Affected by this issue is the function toHTML of the file index.php of the component Markdown Handler. The manipulation leads to cross site scripting. The attack may be launched remotely. The name of the patch is 8f1d0470b4ddb1c7699e3308e765c11ed29542b6. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-216476.

Frequently asked questions

What is CVE-2021-4271?: A vulnerability was found in panicsteve w2wiki. It has been rated as problematic. Affected by this issue is the function toHTML of the file index.php of the component Markdown Handler. The manipulation leads to cross site scripting. The attack may be launched remotely. The name of the patch is 8f1d0470b4ddb1c7699e3308e765c11ed29542b6. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-216476.
How severe is CVE-2021-4271?: CVE-2021-4271 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-4271 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-4271?: CVE-2021-4271 affects W2wiki Project W2wiki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-4271?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-4271 published?: CVE-2021-4271 was published on 2022-12-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:w2wiki_project:w2wiki:-:*:*:*:*:*:*:*

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