CVE-2021-37413: GRANDCOM DynWEB before 4.2 contains a SQL Injection vulnerability in the admin login interface

Q: How do I fix CVE-2021-37413?

dynweb: upgrade to 4.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-37413 being exploited?

CVE-2021-37413 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-37413 affect?

CVE-2021-37413 affects dynweb. Severity is critical (CVSS 9.8). GRANDCOM DynWEB before 4.2 contains a SQL Injection vulnerability in the admin login interface. A remote unauthenticated attacker can exploit this vulnerability to obtain administrative access to the webpage, access the user database, modif

Q: How urgent is CVE-2021-37413?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2021-37413 is a critical-severity flaw (CVSS 9.8) affecting dynweb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GRANDCOM DynWEB before 4.2 contains a SQL Injection vulnerability in the admin login interface. A remote unauthenticated attacker can exploit this vulnerability to obtain administrative access to the webpage, access the user database, modify web content and upload custom files. The backend login script does not verify and sanitize user-provided strings.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-89
Published	2022-05-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: grandcom

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-05-19 15:15 UTCPublished CVE record published
2026-06-17 04:00 UTCUpdated Record last modified

grandcom dynweb UPGRADE

Affected: < 4.2

Fixed in: 4.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dynweb || rpm -q dynweb || dynweb --version

2. UPGRADE to 4.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade dynweb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dynweb

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-37413?

dynweb: upgrade to 4.2. Exact commands for each OS are on this page.

Is CVE-2021-37413 being exploited?

CVE-2021-37413 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-37413 affect?

CVE-2021-37413 affects dynweb. Severity is critical (CVSS 9.8). GRANDCOM DynWEB before 4.2 contains a SQL Injection vulnerability in the admin login interface. A remote unauthenticated attacker can exploit this vulnerability to obtain administrative access to the webpage, access the user database, modif

How urgent is CVE-2021-37413?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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