CVE-2023-23449: sick ag sick ftmg-esd15axx air flow sensor Observable Response Discrepancy
CVSS: 5.3v3.1MediumModified
Published 15-05-2023Last modified 01-06-2026
Vulnerability summary
CVE-2023-23449 is a medium (CVSS 5.3) Observable Response Discrepancy vulnerability in sick ag sick ftmg-esd15axx air flow sensor. EPSS estimates a 0.78% chance of exploitation in the next 30 days, higher than 55.3% of scored vulnerabilities.
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)EPSS score
0.78%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 15-05-2023PublishedVulnerability first disclosed.
- 01-06-2026Last modifiedVulnerability information updated.
Description
Observable Response Discrepancy in SICK FTMg AIR FLOW SENSOR with Partnumbers 1100214, 1100215, 1100216, 1120114, 1120116, 1122524, 1122526 allows a remote attacker to gain information about valid usernames by analyzing challenge responses from the server via the REST interface.
CVSS metrics
2 scores · 2 sources · 1 versionMedium 5.3Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NSourcesAll 2 agree
- NVDNIST5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
0.78%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
0.00 pp
From 0.78% on 20-09-2026
20-09-202620-10-2026
EPSS score0.78%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-204Observable Response DiscrepancyThe product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.
- CWE-203Observable DiscrepancyThe product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
Affected systems
Sick7 products
- ftmg-esd15axx_firmware< 2.0
- ftmg-esd20axx_firmware< 2.0
- ftmg-esd25axx_firmware< 2.0
- ftmg-esn40sxx_firmware< 2.0
- ftmg-esn50sxx_firmware< 2.0
Sick ag7 products
- sick ftmg-esd15axx air flow sensorall firmware versions
- sick ftmg-esd20axx air flow sensorall firmware versions
- sick ftmg-esd25axx air flow sensorall firmware versions
- sick ftmg-esn40sxx air flow sensorall firmware versions
- sick ftmg-esn50sxx air flow sensorall firmware versions
2 vendors · 14 products
References
3 links- sick.com/.well-known/csaf/white/2023/sca-2023-0004.pdfVendor Advisory