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Vulnerability record · CVE-2021-27530 · published 23 March 2021

CVE-2021-27530: Dynpg cross-site scripting vulnerability

Dynpg · Dynpg

A cross-site scripting (XSS) vulnerability in DynPG version 4.9.2 allow remote attacker to inject javascript via URI in /index.php.

4.8 CVSS 3.1 Medium EPSS 0.79% · top 45.7% CWE-79 · Cross-site scripting
4.8CVSS 3.1 base score, v2 3.5
0.79%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A cross-site scripting (XSS) vulnerability in DynPG version 4.9.2 allow remote attacker to inject javascript via URI in /index.php.

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/xoffense/POC/blob/main/DynPG%204.9.2%20XSS%20via%20index.php%20URI ExploitThird Party Advisory
https://github.com/xoffense/POC/blob/main/DynPG%204.9.2%20XSS%20via%20index.php%20URI ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2010-4400Dynpg sql injection vulnerabilitySQL injection vulnerability in _rights.php in DynPG CMS 4.2.0 allows remote attackers to execute arbitrary SQL commands via the giveRights_UserId par…EPSS 2.2%5.4CVE-2020-27406Dynpg cross-site scripting vulnerabilityCross Site Scripting (XSS) vulnerability in DynPG 4.9.1, allows authenticated attackers to execute arbitrary code via the groupname.EPSS 0.76%5.1CVE-2010-1299Dynpg code injection vulnerabilityMultiple PHP remote file inclusion vulnerabilities in DynPG CMS 4.1.0, and possibly earlier, when magic_quotes_gpc is disabled and register_globals i…EPSS 11%5.0CVE-2010-4401Dynpg information exposure vulnerabilitylanguages.inc.php in DynPG CMS 4.2.0 allows remote attackers to obtain sensitive information via a direct request, which reveals the installation pat…EPSS 5.6%4.8CVE-2021-27526Dynpg cross-site scripting vulnerabilityA cross-site scripting (XSS) vulnerability in DynPG version 4.9.2 allows remote attackers to inject JavaScript via the "page" parameter.EPSS 0.79%4.8CVE-2021-27527Dynpg cross-site scripting vulnerabilityA cross-site scripting (XSS) vulnerability in DynPG version 4.9.2 allows remote attackers to inject JavaScript via the "valueID" parameter.EPSS 0.79%4.8CVE-2021-27528Dynpg cross-site scripting vulnerabilityA cross-site scripting (XSS) vulnerability in DynPG version 4.9.2 allows remote attackers to inject JavaScript via the "refID" parameter.EPSS 0.79%4.8CVE-2021-27529Dynpg cross-site scripting vulnerabilityA cross-site scripting (XSS) vulnerability in DynPG version 4.9.2 allows remote attackers to inject JavaScript via the "limit" parameter.EPSS 0.79%

Source: NIST National Vulnerability Database (record CVE-2021-27530), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.