CVE-2016-6854: n/a vulnerability

CVE-2016-6854: An issue was discovered in Open-Xchange OX Guard before 2.4.2-rev5.

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.).

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 01:43 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2016-6854 is a cross-site scripting flaw in Open-Xchange OX Guard before 2.4.2-rev5. A malicious email with an inline PGP signature could run script code when a user verifies the signature, potentially hijacking the user session or causing unwanted webmail actions. Exposure is limited to environments running Open-Xchange OX Guard before 2.4.2-rev5, especially where users verify inline PGP-signed email in the web interface. Treat as high priority if OX Guard is present. The impact is account-context compromise through normal webmail behavior, but evidence does not confirm active exploitation. Mitigation focus: Upgrade OX Guard to 2.4.2-rev5 or later where applicable.; Review the Open-Xchange advisory for vendor-specific remediation guidance.; Warn affected users about unexpected PGP verification prompts until remediated..

Prepared: Jun 13, 2026, 13:16 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2016-6854 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup

Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 15, 2016, 06:31 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
40377CVE reference · exploit, x_refsource_EXPLOIT-DB

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.