CVE-2021-4276 [Medium] | SQL Injection in Hedgehog

** UNSUPPORTED WHEN ASSIGNED ** A vulnerability was found in dns-stats hedgehog. It has been rated as problematic. Affected by this issue is the function DSCIOManager::dsc_import_input_from_source of the file src/DSCIOManager.cpp. The manipulation leads to sql injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The name of the patch is 58922c345d3d1fe89bb2020111873a3e07ca93ac. It is recommended to apply a patch to fix this issue. VDB-216746 is the identifier assigned to this vulnerability. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. NOTE: We do assume that the Data Manager server can only be accessed by authorised users. Because of this, we don’t believe this specific attack is possible without such a compromise of the Data Manager server.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-01-10	0.28%	0.47%	+0.19%
2	2026-01-06	0.07%	0.28%	+0.21%
3	2025-11-21	—	0.07%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-01-10

0.28%

0.47%

+0.19%

2026-01-06

0.07%

0.28%

+0.21%

2025-11-21

—

0.07%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
4.1	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L` 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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:H) They need powerful rights—admin, root, or similar—before this pays off. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. 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:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	0.7	3.4	[email protected]
8.8	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H` 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:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

4.1

3.1

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L 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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H): They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
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:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

0.7

3.4

[email protected]

8.8

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H 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:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

5.9

[email protected]

Affected software / configurations for CVE-2021-4276

Vendor	Product	Version	Raw CPE
dns-stats	hedgehog	< 2021-05-13	cpe:2.3:a:dns-stats:hedgehog::::::::

References for CVE-2021-4276

URL	Tags
https://github.com/dns-stats/hedgehog/commit/58922c345d3d1fe89bb2020111873a3e07ca93ac	Patch Third Party Advisory
https://github.com/dns-stats/hedgehog/pull/190	Patch Third Party Advisory
https://vuldb.com/?id.216746	Third Party Advisory

URL

CVE-2021-4276

Exploit prediction scoring system (EPSS) score for CVE-2021-4276

Common vulnerability scoring system (CVSS) metrics for CVE-2021-4276

Weakness enumeration for CVE-2021-4276

Affected software / configurations for CVE-2021-4276

References for CVE-2021-4276