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Fencer Intel
critical 9.8

CVE-2021-37413 json

GRANDCOM DynWEB before 4.2 contains a SQL Injection vulnerability in the admin login interface.

published 4y ago modified 4mo ago also EUVD-2021-23978

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

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.

Patch / fix

  • grandcom dynweb 4.2

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Exploit prediction

1.94% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/martinkubecka/CVE-References/blob/main/CVE-2021-37413.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-89 Improper Neutralization of Special Elements used in an SQL Command

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.