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CVE-2026-63011

GroupOffice Vulnerable to RCE in TemplateParser eval() via Contact/labels

Products / packages Intermesh groupoffice

Published

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 02:05:34 UTC
GitHub_M · CVSS:4.0 · 9.4
Assessment vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Severity

critical9.4

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

GroupOffice versions prior to 6.8.167, 25.0.102, and 26.0.27 are vulnerable to code injection via the Contact/labels JMAP endpoint, allowing an authenticated attacker to execute arbitrary OS commands. The vulnerability occurs due to the TemplateParser eval() function. A single authenticated HTTP request is sufficient to exploit this weakness.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Intermesh · GitHub_M

groupoffice

3 ranges
GitHub_M version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

< 6.8.167

< 25.0.102

< 26.0.27

unaffected

unknown

Other versions: unknown

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.167, 25.0.102, and 26.0.27, the Contact/labels JMAP endpoint in GroupOffice accepts a fully attacker-controlled template string (tpl parameter) that is passed without restriction to TemplateParser::parse(). When the template contains an [assign] block whose expression includes a {{...}} variable reference, the engine calls eval() on the expanded expression after running it through a validateExpression() guard. The guard double-quotes unrecognized tokens, but PHP 7+ allows a string enclosed in parentheses to be invoked as a function ("system")("id") is valid PHP and calls system("id"). A single authenticated HTTP request is sufficient to execute arbitrary OS commands as the web server user (www-data). This issue has been patched in versions 6.8.167, 25.0.102, and 26.0.27.

References

4 sources
Intermesh/groupoffice · security/advisories/GHSA-4m9w-3p93-6cwx
Security advisoryGitHub_M
Intermesh/groupoffice · releases/tag/v25.0.102
Release notesGitHub_M
Intermesh/groupoffice · releases/tag/v26.0.27
Release notesGitHub_M
Intermesh/groupoffice · releases/tag/v6.8.167
Release notesGitHub_M

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-63011

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-94 ↗

CWE-94: Improper Control of Generation of Code ('Code Injection')

GitHub_M

Related →
CWE-95 ↗

CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

GitHub_M

Related →
CWE-184 ↗

CWE-184: Incomplete List of Disallowed Inputs

GitHub_M

Related →
Contributing organizations · 2
GitHub_M

Assigning organization

2026-11-10
CISA-ADP

Additional data publisher

2026-11-10

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
  1. CVE · CVE-2026-63011

    Observed 2026-11-11T02:57:05.114Z · upstream updated 2026-11-10T21:05:39.787Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-10T21:04:58.470980Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "total"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.