CVE-2016-6854
Script code which got injected to a mail with inline PGP signature gets executed when verifying the signature.
Does this matter?
A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 2.4%. Treat it as high on anything reachable from the internet.
Description
An issue was discovered in Open-Xchange OX Guard before 2.4.2-rev5. Script code which got injected to a mail with inline PGP signature gets executed when verifying the signature. 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.).
- CVSS 3.0
- 6.1 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 2.44% probability · 84th percentile
- Public exploits
- 1 in Exploit-DB · first 13 September 2016
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- open-xchange/ox guard
- Source
- cve@mitre.org
EPSS 2.4% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/138701/Open-Xchange-Guard-2.4.2-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/archive/1/539395/100/0/threaded
- http://www.securityfocus.com/bid/92920Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40377/Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/138701/Open-Xchange-Guard-2.4.2-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/archive/1/539395/100/0/threaded
- http://www.securityfocus.com/bid/92920Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/40377/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.