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CVE Record

CVE-2017-20174: bastianallgeier Kirby Webmentions Plugin injection

A vulnerability was found in bastianallgeier Kirby Webmentions Plugin and classified as problematic. Affected by this issue is some unknown functionality. The manipulation leads to injection. The attack may be launched remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The patch is identified as 55bedea78ae9af916a9a41497bd9996417851502. It is recommended to apply a patch to fix this issue. VDB-218894 is the identifier assigned to this vulnerability.

MediumCVSS 5.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a medium-severity injection issue in the bastianallgeier Kirby Webmentions Plugin. A remote attacker could potentially influence plugin processing, but the public sources describe exploitation as high-complexity and difficult. The key business concern is exposure on Kirby sites using this plugin, especially public sites processing webmentions.

Executive priority

Treat this as a targeted maintenance item, not an emergency. Patch exposed Kirby Webmentions Plugin deployments during the next security update window, faster for public-facing sites or environments handling untrusted webmention submissions.

Technical view

CVE-2017-20174 is classified as CWE-74 injection affecting unspecified functionality in bastianallgeier Kirby Webmentions Plugin. VulDB assigns CVSS 3.1 score 5.6 with network attack vector, no privileges or user interaction, high attack complexity, and low confidentiality, integrity, and availability impact. The source bundle identifies patch commit 55bedea78ae9af916a9a41497bd9996417851502.

Likely exposure

Exposure appears limited to Kirby deployments using the bastianallgeier Kirby Webmentions Plugin. The affected version range is not specified in the provided sources, so teams must inventory installations and compare deployed code with the referenced patch commit.

Exploitation context

The issue is remotely reachable according to the source bundle, but attack complexity is high and exploitation is described as difficult. The CVE is not listed as KEV, and the provided sources do not confirm active exploitation.

Researcher notes

Public detail is limited: affected functionality and versions are not identified in the source bundle. Use the patch commit as the primary technical anchor. Avoid assuming broader Kirby CMS impact; the named product is the bastianallgeier Kirby Webmentions Plugin.

Mitigation direction

  • Identify Kirby sites using bastianallgeier Kirby Webmentions Plugin.
  • Apply the referenced patch commit or a vendor release containing it.
  • Check vendor repository guidance before manually patching production code.
  • Prioritize public sites that process inbound webmention data.
  • Remove unused plugin installations from production deployments.

Validation and detection

  • Inventory plugin directories and dependency records across Kirby sites.
  • Compare deployed plugin code against commit 55bedea78ae9af916a9a41497bd9996417851502.
  • Confirm no unpatched copies remain on public environments.
  • Review webmention processing logs for unusual failures or malformed input.
  • Record affected-version uncertainty in the remediation ticket.
Prepared
Confidence
medium
Sources
5

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.

cwe · low confidence lookup

CWE-74: Exact CWE lookup

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cve · low confidence lookup

CVE-2017-20174 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.6 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

1CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.6CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L2.23.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.6Medium
CVSS 3.1 vector shape for CVE-2017-20174Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
bastianallgeierKirby Webmentions Pluginn/aListed
Weakness

CWE details

CWE-74

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

CWE-74 · source CWE mapping

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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