CVE-2021-23854 [High] | XSS in Cpp6 Firmware

An error in the handling of a page parameter in Bosch IP cameras may lead to a reflected cross site scripting (XSS) in the web-based interface. This issue only affects versions 7.7x and 7.6x. All other versions are not affected.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-03-30	0.61%	0.29%	-0.32%
2	2025-03-29	0.29%	0.61%	+0.32%
3	2025-03-17	—	0.29%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-03-30

0.61%

0.29%

-0.32%

2025-03-29

0.29%

0.61%

+0.32%

2025-03-17

—

0.29%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.3	3.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. 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.	1.6	6.0	[email protected]
6.1	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N` 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:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. 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:N) Service keeps running; no real outage angle.	2.8	2.7	[email protected]
4.3	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:N/I:P/A:N` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:N) No availability impact.	8.6	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.3

3.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
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.

1.6

6.0

[email protected]

6.1

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N 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:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
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:N): Service keeps running; no real outage angle.

2.8

2.7

[email protected]

4.3

2.0

MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:N): No availability impact.

8.6

2.9

[email protected]

Affected software / configurations for CVE-2021-23854

Vendor	Product	Version	Raw CPE
bosch	cpp6_firmware	7.62	cpe:2.3:o:bosch:cpp6_firmware:7.62:::::::*
bosch	cpp6_firmware	7.70	cpe:2.3:o:bosch:cpp6_firmware:7.70:::::::*
bosch	cpp6_firmware	7.72	cpe:2.3:o:bosch:cpp6_firmware:7.72:::::::*
bosch	cpp7_firmware	7.62	cpe:2.3:o:bosch:cpp7_firmware:7.62:::::::*
bosch	cpp7_firmware	7.70	cpe:2.3:o:bosch:cpp7_firmware:7.70:::::::*
bosch	cpp7_firmware	7.72	cpe:2.3:o:bosch:cpp7_firmware:7.72:::::::*
bosch	cpp7.3_firmware	7.62	cpe:2.3:o:bosch:cpp7.3_firmware:7.62:::::::*
bosch	cpp7.3_firmware	7.70	cpe:2.3:o:bosch:cpp7.3_firmware:7.70:::::::*
bosch	cpp7.3_firmware	7.72	cpe:2.3:o:bosch:cpp7.3_firmware:7.72:::::::*
bosch	cpp13_firmware	7.75	cpe:2.3:o:bosch:cpp13_firmware:7.75:::::::*
bosch	cpp13_firmware	7.76	cpe:2.3:o:bosch:cpp13_firmware:7.76:::::::*

References for CVE-2021-23854

URL	Tags
https://psirt.bosch.com/security-advisories/bosch-sa-478243-bt.html	Vendor Advisory

URL

CVE-2021-23854 | Reflected XSS in page parameter

Exploit prediction scoring system (EPSS) score for CVE-2021-23854

Common vulnerability scoring system (CVSS) metrics for CVE-2021-23854

Weakness enumeration for CVE-2021-23854

Affected software / configurations for CVE-2021-23854

References for CVE-2021-23854