7.5

CVE-2023-21761: microsoft exchange_server Server-Side Request Forgery (SSRF)

CVSS: 7.5v3.1HighModified
Published 10-01-2023Last modified 01-01-2025
Open JSON

Vulnerability summary

CVE-2023-21761 is a high (CVSS 7.5) Server-Side Request Forgery (SSRF) vulnerability in microsoft exchange_server. EPSS estimates a 1.64% chance of exploitation in the next 30 days, higher than 76.1% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.64%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 10-01-2023
    PublishedVulnerability first disclosed.
  2. 01-01-2025
    Last modifiedVulnerability information updated.

Description

Microsoft Exchange Server Information Disclosure Vulnerability

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.64%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

+0.04 pp

From 1.59% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.64%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft4 products

1 vendor · 4 products

References

1 links