CVE-2023-26455
RMI was not requiring authentication when calling ChronosRMIService:setEventOrganizer. Attackers...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- High
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2023-26455- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L - Weakness
- CWE-287
- Updated
- 2026-11-02
EUVDEUVD-2023-30275
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.
- Record
EUVD-2023-30275- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9wv2-mrrp-v8g7
RMI was not requiring authentication when calling ChronosRMIService:setEventOrganizer. Attackers...
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.
- Record
GHSA-9wv2-mrrp-v8g7- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L - Weakness
- CWE-287
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2023-26455- CVSS 3.1
- 5.6 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L - CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-26455 is a medium vulnerability (CVSS 5.6) in Open-xchange Appsuite, published November 2, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. No source names a fixed version.
References
software.open-xchange.com/products/appsuite/doc/Release_Notes_for_Patch_Release_6243_7.10.6_2023-08-01.pdf
documentation.open-xchange.com/appsuite/security/advisories/csaf/2023/oxas-adv-2023-0004.json
nvd.nist.gov/vuln/detail/CVE-2023-26455
github.com/advisories/GHSA-9wv2-mrrp-v8g7