CVE-2023-0897 | Session FIxation in Sielco PolyEco1000

Sielco PolyEco1000 is vulnerable to a session hijack vulnerability due to the cookie being vulnerable to a brute force attack, lack of SSL, and the session being visible in requests.

Published: 2023-10-26 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-0897 is rated Moderate Risk (43.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.08%). Review affected assets and schedule remediation.

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-2023-0897

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 2025-11-21 0.21% 0.08% -0.13%
2 2025-11-18 0.08% 0.21% +0.13%
3 2025-03-30 — 0.08% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-0897

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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: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: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]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/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:N)
No account or special rights needed—anonymous or random user is enough.
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.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2023-0897

Affected software / configurations for CVE-2023-0897

Vendor Product Version Raw CPE
sielco polyeco500_firmware 1.7.0 cpe:2.3:o:sielco:polyeco500_firmware:1.7.0:*:*:*:cpu:*:*:*
sielco polyeco500_firmware 10.16 cpe:2.3:o:sielco:polyeco500_firmware:10.16:*:*:*:fpga:*:*:*
sielco polyeco300_firmware 2.0.0 cpe:2.3:o:sielco:polyeco300_firmware:2.0.0:*:*:*:cpu:*:*:*
sielco polyeco300_firmware 2.0.2 cpe:2.3:o:sielco:polyeco300_firmware:2.0.2:*:*:*:cpu:*:*:*
sielco polyeco300_firmware 10.19 cpe:2.3:o:sielco:polyeco300_firmware:10.19:*:*:*:fpga:*:*:*
sielco polyeco1000_firmware 1.9.3 cpe:2.3:o:sielco:polyeco1000_firmware:1.9.3:*:*:*:cpu:*:*:*
sielco polyeco1000_firmware 1.9.4 cpe:2.3:o:sielco:polyeco1000_firmware:1.9.4:*:*:*:cpu:*:*:*
sielco polyeco1000_firmware 2.0.6 cpe:2.3:o:sielco:polyeco1000_firmware:2.0.6:*:*:*:cpu:*:*:*
sielco polyeco1000_firmware 10.19 cpe:2.3:o:sielco:polyeco1000_firmware:10.19:*:*:*:fpga:*:*:*

References for CVE-2023-0897

URL Tags
https://www.cisa.gov/news-events/ics-advisories/icsa-23-299-07 Third Party Advisory US Government Resource
cvelogic Threat Intelligence