An issue was discovered in Open-Xchange OX Guard before 2.4.2-rev5.

Published 9 y ago 2016-12-15 · modified 4 mo ago 2026-06-17 · JSON

CVSS

6.1

v3.0 · NVD

CISA KEV

not known exploited

EPSS

2.6%

percentile 86%

Public exploits

Exploit-DB

An issue was discovered in Open-Xchange OX Guard before 2.4.2-rev5. Script code can be provided as parameter to the OX Guard guest reader web application. This allows cross-site scripting attacks against arbitrary users since no prior authentication is needed. Malicious script code can be executed within a user's context. This can lead to session hijacking or triggering unwanted actions via the web interface (sending mail, deleting data etc.) in case the user has an active session on the same domain already.

Exploit prediction (EPSS)

2.64% probability of exploitation in the next 30 days, higher than 86% of all scored CVEs.

Exploits and detections

EDB-40377 Open-Xchange Guard 2.4.2 - Multiple Cross-Site Scripting Vulnerabilities · webapps · 2016-09-13

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	6.1	`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`
NVD	2.0	4.3	`AV:N/AC:M/Au:N/C:N/I:P/A:N`

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

securityfocus.com /bid/92920 · vdb-entry, x_refsource_BID, x_transferred
packetstormsecurity.com /files/138701/Open-Xchange-Guard-2.4.2-Cross-Site-Scripting.html · x_refsource_CONFIRM, x_transferred
exploit-db.com /exploits/40377/ · exploit, x_refsource_EXPLOIT-DB, x_transferred
securityfocus.com /archive/1/539395/100/0/threaded · mailing-list, x_refsource_BUGTRAQ, x_transferred

Sources

CVE List: CVE-2016-6851
NVD: CVE-2016-6851

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.