How severe is CVE-2021-3318?

CVE-2021-3318 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-3318 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3318?

CVE-2021-3318 affects Dzzoffice. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3318?

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

When was CVE-2021-3318 published?

CVE-2021-3318 was published on 2021-01-27 and last updated on 2026-06-17.

CVE-2021-3318

CVE-2021-3318 is a medium-severity vulnerability in Dzzoffice with a CVSS 3.x base score of 6.1. 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: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Dzzoffice
Published: 2021-01-27
Last modified: 2026-06-17

Description

attach/ajax.php in DzzOffice through 2.02.1 allows XSS via the editorid parameter.

Frequently asked questions

What is CVE-2021-3318?: attach/ajax.php in DzzOffice through 2.02.1 allows XSS via the editorid parameter.
How severe is CVE-2021-3318?: CVE-2021-3318 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-3318 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3318?: CVE-2021-3318 affects Dzzoffice. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3318?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3318 published?: CVE-2021-3318 was published on 2021-01-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dzzoffice:dzzoffice:*:*:*:*:*:*:*:*

More vulnerabilities in Dzzoffice

CVE-2025-63695 — Critical (CVSS 9.8): DzzOffice v2.3.7 and before is vulnerable to Arbitrary File Upload in /dzz/system/ueditor/php/controller.php.
CVE-2025-63694 — Critical (CVSS 9.8): DzzOffice v2.3.7 and before is vulnerable to SQL Injection in explorer/groupmanage.
CVE-2024-41376 — High (CVSS 8.8): dzzoffice 2.02.1 is vulnerable to Directory Traversal via user/space/about.php.
CVE-2022-43340 — High (CVSS 8.8): A Cross-Site Request Forgery (CSRF) in dzzoffice 2.02.1_SC_UTF8 allows attackers to arbitrarily create user accounts…
CVE-2023-39853 — Medium (CVSS 6.5): SQL Injection vulnerability in Dzzoffice version 2.01, allows remote attackers to obtain sensitive information via the…
CVE-2024-29273 — Medium (CVSS 6.1): There is Stored Cross-Site Scripting (XSS) in dzzoffice 2.02.1 SC UTF8 in uploadfile to index.php, with the XSS payload…

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