CVE-2021-30203

Exp

A reflected cross-site scripting (XSS) vulnerability in the zero parameter of dzzoffice 2.02.1_SC_UTF8 allows attackers to execute arbitrary web scripts or HTML.

Published: 2023-06-27 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-30203 is rated High Exploit Risk (65.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.90%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-30203

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-30203

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-25 1.09% 0.90% -0.18%
2 2026-03-22 0.95% 1.09% +0.13%
3 2026-03-14 — 0.95% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-30203

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]

Weakness enumeration for CVE-2021-30203

Affected software / configurations for CVE-2021-30203

Vendor Product Version Raw CPE
dzzoffice dzzoffice 2.02.1 cpe:2.3:a:dzzoffice:dzzoffice:2.02.1:*:*:*:*:*:*:*

References for CVE-2021-30203

URL Tags
https://github.com/zyx0814/dzzoffice/issues/183 Exploit Issue Tracking
cvelogic Threat Intelligence