CVE-2021-44667

mediumpriority · track · 34EPSS 0.008 · 57 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.83% (57th) EPSS

CVSS 4.3 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

A Cross Site Scripting (XSS) vulnerability exists in Nacos 2.0.3 in auth/users via the (1) pageSize and (2) pageNo parameters.

cvss

Technical severity, 0–10. One row per scoring source.

6.1

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 2.7

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nsecondary · OSV

v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-79US

exploits (1)

Public proof-of-concept and weaponised exploit code.

shoucheng3/alibaba__nacos_CVE-2021-44667_2-0-3shoucheng3/alibaba__nacos_CVE-2021-44667_2-0-3PoC · poc_in_github

affected products (4)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
alibaba nacos= 2.0.3nvdUScpe:2.3:a:alibaba:nacos:*:*:*:*:*:*:*:*
Maven com.alibaba.nacos:nacos-common< 1.4.5osvUSpkg:maven/com.alibaba.nacos/nacos-common
Maven com.alibaba.nacos:nacos-common2.0.0-ALPHA.1 → 2.1.0-BETAosvUSpkg:maven/com.alibaba.nacos/nacos-common

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-4gr7-qw2q-jxh6Cross-site Scripting in Nacos2022-03-12ghsa · osvUS
A Cross Site Scripting (XSS) vulnerability exists in Nacos prior to 1.4.5 and 2.1.0-BETA in auth/users via the (1) pageSize and (2) pageNo parameters.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2022-03-11modified 2026-06-17

related (53,020)

Related entries.

ID	severity	EPSS	exploitable	published
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Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.
CVE-2025-68461US	medium6.1OT critical	27.4% (98th)	KEV	2025-12-18
Roundcube Webmail before 1.5.12 and 1.6 before 1.6.12 is prone to a Cross-Site-Scripting (XSS) vulnerability via the animate tag in an SVG document.
CVE-2025-48700US	—OT critical	1.71% (77th)	KEV	2025-06-23
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0 and 10.0 and 10.1. A Cross-Site Scripting (XSS) vulnerability in the Zimbra Classic UI allows attackers to exec…
CVE-2025-27915US	—OT critical	4.06% (91st)	KEV	2025-03-12
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0 and 10.1. A stored cross-site scripting (XSS) vulnerability exists in the Classic Web Client due to insufficient…

+53015 more

references (4)

External citations — patches, advisories, analysis.

https://cxsecurity.com/cveshow/CVE-2021-44667/cnnvd
https://github.com/alibaba/nacos/issues/7359 cnnvd
https://github.com/alibaba/nacos/issues/7359 enisa_euvd
https://github.com/alibaba/nacos/issues/7359ExploitIssue TrackingThird Party Advisorynvd

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