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CVE-2018-1000550: The Sympa Community Sympa version prior to version 6.2.32 contains a Directory Traversal vulnerability in w...

The Sympa Community Sympa version prior to version 6.2.32 contains a Directory Traversal vulnerability in wwsympa.fcgi template editing function that can result in Possibility to create or modify files on the server filesystem. This attack appear to be exploitable via HTTP GET/POST request. This vulnerability appears to have been fixed in 6.2.32.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2018-1000550 affects Sympa, a mailing list server. In versions before 6.2.32, a web template editing feature could allow directory traversal, creating or modifying files on the server filesystem. The sources say it was fixed in Sympa 6.2.32, with Debian and Ubuntu security updates available.

Executive priority

Treat this as a high-priority remediation item for any internet-facing Sympa deployment. The direct business risk is unauthorized server file modification, while evidence for active exploitation is absent from the provided sources.

Technical view

The issue is a directory traversal flaw in the wwsympa.fcgi template editing function. The CVE description says exploitation is possible through HTTP GET or POST requests and may result in server filesystem file creation or modification. No CVSS vector, CWE, or detailed authentication preconditions are provided in the source bundle.

Likely exposure

Exposure is most likely where Sympa before 6.2.32 is deployed, especially if the wwsympa.fcgi web interface is reachable. Debian and Ubuntu users should also verify whether their installed packages include the referenced security updates.

Exploitation context

The bundle does not show CISA KEV listing or cited evidence of active exploitation. It does state the issue appears exploitable via HTTP GET or POST. Authentication requirements, exploit reliability, and real-world attack reports are not established by the provided sources.

Researcher notes

Important missing details include CVSS, CWE mapping, authentication context, affected configuration scope, and proof of exploitation. Use vendor advisories and package changelogs to confirm fixed builds rather than assuming all pre-6.2.32 packages remain vulnerable.

Mitigation direction

  • Upgrade Sympa to version 6.2.32 or later.
  • Apply the relevant Debian or Ubuntu security update where packaged Sympa is used.
  • Check Sympa Community guidance for any additional version-specific instructions.
  • Prioritize patching internet-reachable wwsympa.fcgi deployments first.

Validation and detection

  • Inventory Sympa deployments and record installed package or application versions.
  • Confirm deployed versions are 6.2.32 or vendor-patched equivalents.
  • Identify whether wwsympa.fcgi is exposed to untrusted networks.
  • Review server file integrity and recent changes around Sympa-managed paths.
Prepared
Confidence
medium
Sources
6

Public sources used

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.

description · low confidence lookup

File access behavior lookup

The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2018-1000550 mapping review

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

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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
5Source links

CVSS and timeline data

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

Source materials

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.