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CVE Record

CVE-2017-0365: XSS in SearchHighlighter::highlightText() [requires non-default config]

Mediawiki before 1.28.1 / 1.27.2 / 1.23.16 contains a XSS vulnerability in SearchHighlighter::highlightText() with non-default configurations.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a stored or reflected cross-site scripting risk in MediaWiki search highlighting, present before fixed releases 1.28.1, 1.27.2, and 1.23.16. Exposure depends on non-default configuration. For an organization running public or internal MediaWiki, the main concern is browser-side script execution against users who view affected search-related content.

Executive priority

Address during normal vulnerability remediation, faster for public or user-editable wikis. The issue is a real XSS class vulnerability, but the provided evidence shows a configuration precondition and no confirmed active exploitation.

Technical view

CVE-2017-0365 affects MediaWiki SearchHighlighter::highlightText() before 1.28.1, 1.27.2, and 1.23.16 under non-default configurations. The source bundle identifies XSS but does not provide CVSS, CWE, exact configuration keys, exploit details, or affected distribution package versions beyond the linked advisories.

Likely exposure

Likely limited to MediaWiki deployments running versions older than 1.28.1, 1.27.2, or 1.23.16 with the relevant non-default search highlighting configuration. Public wikis have higher business exposure because anonymous users may interact with search surfaces.

Exploitation context

The provided sources do not confirm active exploitation, and the CVE is not marked KEV. Treat this as a patch verification issue for exposed MediaWiki instances, not as evidence of ongoing exploitation.

Researcher notes

Evidence is incomplete for precise scoring: no CVSS, CWE, exploit status, exact vulnerable configuration, or patch details are included in the bundle. Use the Wikimedia release notice, Phabricator issue, and Debian tracker to validate product-specific remediation.

Mitigation direction

  • Upgrade MediaWiki to 1.28.1, 1.27.2, 1.23.16, or a later supported release.
  • Review MediaWiki search highlighting configuration for non-default settings tied to the advisory.
  • For Debian-managed systems, follow the Debian tracker and package security guidance.
  • Prioritize public-facing MediaWiki instances and wikis with untrusted users.
  • Check vendor guidance before applying configuration-only mitigations.

Validation and detection

  • Inventory all MediaWiki instances and record exact versions.
  • Confirm no instance runs before 1.28.1, 1.27.2, or 1.23.16.
  • Review configuration for non-default search highlighting behavior.
  • Verify Debian package status where MediaWiki is installed through Debian packages.
  • Regression test search pages after upgrade without using offensive payloads.
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

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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
4Source 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
mediawikimediawikin/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.