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01 Record

CVE-2026-2345

Insufficient Origin Validation in Proctorio Chrome Extension postMessage Handlers

LowPUBLISHEDCNA: Hackrate
CNA base score3.6 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

02 Description

Insufficient Origin Validation in Proctorio Chrome Extension postMessage Handlers

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.07% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 0.0% of scored records. A rank, not a probability.
NVD base score
3.6 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
NVD analysis status
Deferred. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-02-11 14:49Z8 MO AGO
Last updated
2026-02-11 21:19Z8 MO AGO
Reserved
2026-02-11
Assigning CNA
Hackrate
Record state
PUBLISHED
Severity
Low (CVSS 3.6)
CNA CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Weaknesses
  • CWE-346Origin Validation ErrorClass
Data version
5.2
Document digest
930a00436b6189a8f6743e4a4531884a01914dad1e7308e38e75b414e147a003

05 Affected products

VendorProductVersionsPlatforms
ProctorioSecure Exam Proctor Extension1.5.25220.33—

06 References