Security readout for executives and security teams
Plain-English summary
CVE-2026-22712 is a low-severity issue in Wikimedia’s MediaWiki ApprovedRevs extension. A content handling flaw can let specially crafted input bypass the inline CSS sanitizer during page parsing. The disclosed impact is limited, but sites using the affected extension versions should track Wikimedia’s fix guidance and update when available.
Executive priority
Treat as routine patch management unless the affected extension is widely used on public or high-trust wikis. The known severity is low, but public-facing collaborative platforms should still update promptly to reduce content integrity and presentation risks.
Technical view
The issue is improper output encoding/escaping caused by magic word replacement in ParserAfterTidy. It affects ApprovedRevs extension versions 1.45, 1.44, 1.43, and 1.39. CVSS 4.0 score is 2.3, with network attack vector, low complexity, no privileges required, and user interaction/attack requirements present.
Likely exposure
Exposure is limited to MediaWiki installations running the ApprovedRevs extension in versions 1.45, 1.44, 1.43, or 1.39. The CVE record marks other default status as unaffected. Organizations not using this extension are not indicated as affected by the provided sources.
Exploitation context
No active exploitation is reported in the provided sources, and the CVE is not listed as CISA KEV. The CVSS vector suggests exploitation requires specific conditions and user interaction. Public details identify the vulnerability class and affected versions, but not weaponized exploitation.
Researcher notes
The public record is sparse. It identifies CWE-116, ParserAfterTidy magic word replacement, and inline CSS sanitizer bypass, but does not provide detailed exploit mechanics. Analysis should focus on affected extension versions and upstream Wikimedia references, avoiding assumptions about broader MediaWiki core exposure.
Mitigation direction
- Inventory MediaWiki instances for the ApprovedRevs extension and affected versions.
- Review Wikimedia Phabricator task T412068 for vendor guidance and status.
- Review the linked Wikimedia Gerrit change for the relevant upstream code update.
- Apply vendor-provided updates or backports when they are available.
- Restrict who can submit or edit content where practical until remediated.
Validation and detection
- Confirm whether ApprovedRevs is installed on each MediaWiki instance.
- Record the extension version and compare it to 1.45, 1.44, 1.43, and 1.39.
- Check whether vendor-referenced Gerrit changes are present in deployed code.
- Review logs and recent content changes for unusual styling-related edits.
- Document unaffected systems where ApprovedRevs is absent or outside affected versions.
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-116: 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-2026-22712 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/T412068CVE reference
- https://gerrit.wikimedia.org/r/q/Iee1bf1cbc8a519899e7f9dde508856bd4e5a5d2aCVE 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 Encoding or Escaping of Output
Improper Encoding or Escaping of Output represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.