An issue was discovered in Wikimedia Parsoid before 0.11.1 and 0.12.x before 0.12.2.
Priority LOW 29CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
An issue was discovered in Wikimedia Parsoid before 0.11.1 and 0.12.x before 0.12.2. An attacker can send crafted wikitext that Utils/WTUtils.php will transform by using a <meta> tag, bypassing sanitization steps, and potentially allowing for XSS.
Why it matters now
EPSS 0.00977 62nd percentileScored 2026-11-07
Fix Fixed wikimedia/parsoid (Packagist): 0.12.2, 0.11.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | wikimedia/parsoid (Packagist) | 0.12 to before 0.12.2 | 0.12.2 | Patch available | GHSA-5pqx-77vf-85rw |
| — | wikimedia/parsoid (Packagist) | before 0.11.1 | 0.11.1 | Patch available | GHSA-5pqx-77vf-85rw |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- wikimedia/parsoid (Packagist) Vendor— Affected 0.12 to before 0.12.2 Fixed in 0.12.2 Patch available GHSA-5pqx-77vf-85rw
- wikimedia/parsoid (Packagist) Vendor— Affected before 0.11.1 Fixed in 0.11.1 Patch available GHSA-5pqx-77vf-85rw
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wikimedia:parsoid:*:*:*:*:*:node.js:*:* | before 0.11.1; 0.12.0 to before 0.12.2 | Vulnerable | Wikimedia Foundation |
- cpe:2.3:a:wikimedia:parsoid:*:*:*:*:*:node.js:*:* Versions before 0.11.1; 0.12.0 to before 0.12.2 Vulnerable ·Wikimedia Foundation
Remediation
- Fix · GHSA-5pqx-77vf-85rw wikimedia/parsoid (Packagist) Fixed in 0.12.2 Advisory →
- Fix · GHSA-5pqx-77vf-85rw wikimedia/parsoid (Packagist) Fixed in 0.11.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-30458
- 2026-10-03 Alias added: GHSA-5pqx-77vf-85rw
References
Advisory 4
More Wikimedia Foundation Parsoid vulnerabilities
- TI-2025-38072 Sanitizer::validateAttributes data-XSS CVSS 4.0N/A 0.0
Sources
- CVE-2021-30458 · CVE Program
- CVE-2021-30458 · NVD
- FIRST EPSS
- GHSA-5pqx-77vf-85rw · GitHub Advisory Database · CC BY 4.0
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