CVE-2020-16969
Vulnerability Scoring
Status: Modified - Last modified: 31 Dec 2023, 20:15 UTC Published: 16 Oct 2020, 23:15 UTC
<p>An information disclosure vulnerability exists in how Microsoft Exchange validates tokens when handling certain messages. An attacker who successfully exploited the vulnerability could use this to gain further information from a user.</p> <p>To exploit the vulnerability, an attacker could include specially crafted OWA messages that could be loaded, without warning or filtering, from the attacker-controlled URL. This callback vector provides an information disclosure tactic used in web beacons and other types of tracking systems.</p> <p>The security update corrects the way that Exchange handles these token validations.</p>
Above is the Access Complexity Graph for CVE-2020-16969. It helps visualize the difficulty level and privilege requirements needed to exploit this vulnerability, providing a quick assessment of its exploitation feasibility.
Above is the CVSS Sub-score Breakdown for CVE-2020-16969, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
Below is the Impact Analysis for CVE-2020-16969, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
The EPSS score estimates the probability that this vulnerability will be exploited in the near future.
EPSS Score: 0.164% (probability of exploit)
EPSS Percentile: 54.13%
(lower percentile = lower relative risk)
This vulnerability is less risky than approximately 45.87% of others.
NVD-CWE-Other
secure@microsoft.com
Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
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