4.3

CVE-2023-26432: open-xchange open-xchange_appsuite_backend Uncontrolled Resource Consumption

CVSS: 4.3v3.1MediumModified
Published 20-06-2023Last modified 03-12-2024
Open JSON

Vulnerability summary

CVE-2023-26432 is a medium (CVSS 4.3) Uncontrolled Resource Consumption vulnerability in open-xchange open-xchange_appsuite_backend. EPSS estimates a 1.15% chance of exploitation in the next 30 days, higher than 66.5% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-06-2023
    PublishedVulnerability first disclosed.
  2. 03-12-2024
    Last modifiedVulnerability information updated.

Description

When adding an external mail account, processing of SMTP "capabilities" responses are not limited to plausible sizes. Attacker with access to a rogue SMTP service could trigger requests that lead to excessive resource usage and eventually service unavailability. We now limit accepted SMTP server response to reasonable length/size. No publicly available exploits are known.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.15%

Chance of exploitation in the next 30 days

Percentile

67%

Versus all other CVEs

30-day change

0.00 pp

From 1.15% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.15%

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

Open-xchange1 product
Ox software gmbh1 product

2 vendors · 2 products

References

4 links