Security readout for executives and security teams
Plain-English summary
CVE-2026-22713 is a low-severity stored cross-site scripting issue in Wikimedia’s MediaWiki GrowthExperiments extension. Malicious content in edit summaries may be stored and later executed in another user’s browser. Business urgency is limited, but public-facing wikis using affected versions should still review exposure and apply vendor guidance.
Executive priority
Treat this as routine but time-bound remediation for affected public wikis. It is low severity, not known to be actively exploited from the provided sources, but stored XSS can affect user trust and administrative sessions if left unaddressed.
Technical view
The issue is CWE-79 improper neutralization during web page generation. It affects MediaWiki GrowthExperiments extension versions 1.45, 1.44, 1.43, and 1.39. CVSS v4.0 score is 2.3, with network attack vector, low complexity, required user interaction, and low impacts across confidentiality, integrity, and availability.
Likely exposure
Exposure is limited to MediaWiki deployments that have the GrowthExperiments extension installed at affected versions. Internet-facing wikis, community editing environments, and sites where untrusted users can create edit summaries should prioritize inventory and vendor review.
Exploitation context
The CVE describes stored XSS through edit summaries. The source bundle does not show CISA KEV listing or cite active exploitation. Exploitation appears to require a victim viewing affected rendered content, and CVSS indicates user interaction and attack prerequisites are present.
Researcher notes
Public evidence identifies the vulnerable component and affected versions, but the provided sources do not name fixed versions or detailed remediation steps. Avoid assuming patch availability beyond the linked Wikimedia task and Gerrit query. Validate exposure by extension presence and version, then follow Wikimedia’s published guidance.
Mitigation direction
- Inventory MediaWiki deployments using the GrowthExperiments extension.
- Identify installations running versions 1.45, 1.44, 1.43, or 1.39.
- Review Wikimedia Phabricator T411144 for vendor guidance.
- Review the linked Wikimedia Gerrit query for related fixes.
- Apply vendor-provided updates or backports when available.
- Consider disabling GrowthExperiments if no update is available and risk is unacceptable.
Validation and detection
- Confirm installed MediaWiki and GrowthExperiments extension versions.
- Check whether local code includes relevant Wikimedia Gerrit fixes.
- Review edit-summary rendering for proper escaping in a test environment.
- Monitor reports for unexpected script execution or suspicious edit summaries.
- Track CVE and vendor pages for fixed-version information.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-22713 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 2.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
2.3LowVector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
Source materials
- CVE List V5 sourceCVE List V5
- https://phabricator.wikimedia.org/T411144CVE reference
- https://gerrit.wikimedia.org/r/q/Iff01940a163ed87ec52f3a64ba6b2dbfa2759df3CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.