How severe is CVE-2022-4821?

CVE-2022-4821 has a CVSS 3.x base score of 2.4, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2022-4821 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-4821?

CVE-2022-4821 affects Flatpress. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-4821?

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

When was CVE-2022-4821 published?

CVE-2022-4821 was published on 2022-12-28 and last updated on 2026-06-17.

CVE-2022-4821

CVE-2022-4821 is a low-severity vulnerability in Flatpress with a CVSS 3.x base score of 2.4. 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 2.4)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Flatpress
Published: 2022-12-28
Last modified: 2026-06-17

Description

A vulnerability classified as problematic was found in FlatPress. This vulnerability affects the function onupload of the file admin/panels/uploader/admin.uploader.php of the component XML File Handler/MD File Handler. The manipulation leads to cross site scripting. The attack can be initiated remotely. The name of the patch is 3cc223dec5260e533a84b5cf5780d3a4fbf21241. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-217000.

Frequently asked questions

What is CVE-2022-4821?: A vulnerability classified as problematic was found in FlatPress. This vulnerability affects the function onupload of the file admin/panels/uploader/admin.uploader.php of the component XML File Handler/MD File Handler. The manipulation leads to cross site scripting. The attack can be initiated remotely. The name of the patch is 3cc223dec5260e533a84b5cf5780d3a4fbf21241. It is recommended to apply a patch to fix this issue. The identifier of this vulnerability is VDB-217000.
How severe is CVE-2022-4821?: CVE-2022-4821 has a CVSS 3.x base score of 2.4, rated low severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2022-4821 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-4821?: CVE-2022-4821 affects Flatpress. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-4821?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-4821 published?: CVE-2022-4821 was published on 2022-12-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:flatpress:flatpress:-:*:*:*:*:*:*:*

More vulnerabilities in Flatpress

CVE-2023-0947 — Critical (CVSS 9.8): Path Traversal in GitHub repository flatpressblog/flatpress prior to 1.3.
CVE-2022-4606 — Critical (CVSS 9.8): PHP Remote File Inclusion in GitHub repository flatpressblog/flatpress prior to 1.3.
CVE-2020-22761 — High (CVSS 8.8): Cross Site Request Forgery (CSRF) vulnerability in FlatPress 1.1 via the DeleteFile function in flat/admin.php.
CVE-2024-4023 — High (CVSS 8.1): A stored cross-site scripting (XSS) vulnerability exists in flatpressblog/flatpress version 1.3. When a user uploads a…
CVE-2024-41290 — High (CVSS 8.1): FlatPress CMS v1.3.1 1.3 was discovered to use insecure methods to store authentication data via the cookie's component.
CVE-2023-1105 — High (CVSS 8.1): External Control of File Name or Path in GitHub repository flatpressblog/flatpress prior to 1.3.

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