CVE-2023-26445Network attack vector

Session hijacking via unsanitized frontend theme resource

Published Aug 2, 2023 · Updated Aug 2, 2024

Stored cross-site scripting in OX App Suite frontend 7.10.6-rev27 and earlier allows attackers to hijack user sessions. A user-controlled jslob theme setting can reference a malicious resource that the login flow processes without validating the theme against allowed values. Exploitation requires temporary account access or a victim login to a compromised account, enabling script execution in that victim's context and unwanted web or API actions.

CVSS severity5.4
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in OX App Suite frontend 7.10.6-rev27 and earlier allows attackers to hijack user sessions. A user-controlled jslob theme setting can reference a malicious resource that the login flow processes without validating the theme against allowed values. Exploitation requires temporary account access or a victim login to a compromised account, enabling script execution in that victim's context and unwanted web or API actions.

The record

CVE
CVE-2023-26445
Published
Aug 2, 2023
Updated
Aug 2, 2024
Vendor
Open-Xchange GmbH
Product
OX App Suite
Classifications
CWE-79, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=7.10.6-rev27

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open-Xchange GmbH · OX App Suiteversion=0 <=7.10.6-rev27

Published CVSS scores

5.4Open-Xchange GmbHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:L
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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