7.8

CVE-2023-26455: open-xchange open-xchange_appsuite Improper Authentication

CVSS: 7.8v3.1HighModified
Published 02-11-2023Last modified 02-08-2024
Open JSON

Vulnerability summary

CVE-2023-26455 is a high (CVSS 7.8) Improper Authentication vulnerability in open-xchange open-xchange_appsuite. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 7.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.19%
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. 02-11-2023
    PublishedVulnerability first disclosed.
  2. 02-08-2024
    Last modifiedVulnerability information updated.

Description

RMI was not requiring authentication when calling ChronosRMIService:setEventOrganizer. Attackers with local or adjacent network access could abuse the RMI service to modify calendar items using RMI. RMI access is restricted to localhost by default. The interface has been updated to require authenticated requests. No publicly available exploits are known.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.19%

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
  • open-xchange_appsuite< 7.10.6 | 7.10.6 | 7.10.6:patch_release_6069 | 7.10.6:patch_release_6073 | 7.10.6:patch_release_6080 | 7.10.6:patch_release_6085 | 7.10.6:patch_release_6093 | 7.10.6:patch_release_6102 | 7.10.6:patch_release_6112 | 7.10.6:patch_release_6121 | 7.10.6:patch_release_6133 | 7.10.6:patch_release_6138 | 7.10.6:patch_release_6141 | 7.10.6:patch_release_6146 | 7.10.6:patch_release_6147 | 7.10.6:patch_release_6148 | 7.10.6:patch_release_6150 | 7.10.6:patch_release_6156 | 7.10.6:patch_release_6161 | 7.10.6:patch_release_6166 | 7.10.6:patch_release_6173 | 7.10.6:patch_release_6176 | 7.10.6:patch_release_6178 | 7.10.6:patch_release_6189 | 7.10.6:patch_release_6194 | 7.10.6:patch_release_6199 | 7.10.6:patch_release_6204 | 7.10.6:patch_release_6205 | 7.10.6:patch_release_6209 | 7.10.6:patch_release_6210 | 7.10.6:patch_release_6214 | 7.10.6:patch_release_6215 | 7.10.6:patch_release_6216 | 7.10.6:patch_release_6218 | 7.10.6:patch_release_6219 | 7.10.6:patch_release_6220 | 7.10.6:patch_release_6227 | 7.10.6:patch_release_6230 | 7.10.6:patch_release_6233 | 7.10.6:patch_release_6235 | 7.10.6:patch_release_6236 | 7.10.6:patch_release_6239 | 7.10.6:patch_release_6241
Ox software gmbh1 product

2 vendors · 2 products

References

2 links