CVE-2021-34563 | In WirelessHART-Gateway versions 3.0.8 and 3.0.9 the HttpOnly flag is missing in a cookie which allows client-side javascript to modify it

In PEPPERL+FUCHS WirelessHART-Gateway 3.0.8 and 3.0.9 the HttpOnly attribute is not set on a cookie. This allows the cookie's value to be read or set by client-side JavaScript.

Published: 2021-08-31 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-34563 is rated Low Risk (18.2/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.23%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-34563

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.05% 0.23% +0.18%
2 2025-11-21 0.05% 0.05% -0.00%
3 2025-11-18 — 0.05% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-34563

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.3 3.1 LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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: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:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 1.4 [email protected]
3.3 3.1 LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.8 1.4 [email protected]
2.1 2.0 LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 3.9 2.9 [email protected]

Weakness enumeration for CVE-2021-34563

Affected software / configurations for CVE-2021-34563

Vendor Product Version Raw CPE
pepperl-fuchs wha-gw-f2d2-0-as-z2-eth_firmware 3.0.8 cpe:2.3:o:pepperl-fuchs:wha-gw-f2d2-0-as-z2-eth_firmware:3.0.8:*:*:*:*:*:*:*
pepperl-fuchs wha-gw-f2d2-0-as-z2-eth_firmware 3.0.9 cpe:2.3:o:pepperl-fuchs:wha-gw-f2d2-0-as-z2-eth_firmware:3.0.9:*:*:*:*:*:*:*
pepperl-fuchs wha-gw-f2d2-0-as-z2-eth.eip_firmware 3.0.8 cpe:2.3:o:pepperl-fuchs:wha-gw-f2d2-0-as-z2-eth.eip_firmware:3.0.8:*:*:*:*:*:*:*
pepperl-fuchs wha-gw-f2d2-0-as-z2-eth.eip_firmware 3.0.9 cpe:2.3:o:pepperl-fuchs:wha-gw-f2d2-0-as-z2-eth.eip_firmware:3.0.9:*:*:*:*:*:*:*

References for CVE-2021-34563

cvelogic Threat Intelligence