wlc: print_html outputs API data without HTML escaping, enabling stored XSS
Priority LOW 22CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
wlc is a Weblate command-line client using Weblate's REST API. Prior to version 2.0.0, the HTML output format in wlc embeds API response data into HTML without escaping, allowing cross-site scripting when the output is rendered in a browser. This issue has been patched in version 2.0.0.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00174 6th percentileScored 2026-11-07
Fix Fixed wlc (WeblateOrg): 2.0.0wlc (PyPI): 2.0.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| WeblateOrg | wlc | before 2.0.0 | 2.0.0 | Patch available | CNA |
| — | wlc (PyPI) | before 2.0.0 | 2.0.0 | Patch available | GHSA-gx2m-mcc2-r4p3 |
- wlc VendorWeblateOrg Affected before 2.0.0 Fixed in 2.0.0 Patch available CNA
- wlc (PyPI) Vendor— Affected before 2.0.0 Fixed in 2.0.0 Patch available GHSA-gx2m-mcc2-r4p3
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:weblate:wlc:*:*:*:*:*:*:*:* | before 2.0.0 | Vulnerable | WeblateOrg |
- cpe:2.3:a:weblate:wlc:*:*:*:*:*:*:*:* Versions before 2.0.0 Vulnerable ·WeblateOrg
Remediation
- Fix · CNA wlc (WeblateOrg) Fixed in 2.0.0
- Fix · GHSA-gx2m-mcc2-r4p3 wlc (PyPI) Fixed in 2.0.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-42150
- 2026-10-03 Alias added: GHSA-gx2m-mcc2-r4p3
References
Patch 2
Advisory 2
More WeblateOrg Wlc vulnerabilities
- TI-2026-18959 wlc Path traversal: Unsanitized API slugs in download command CVSS 3.1HIGH 8.1
- TI-2026-17861 wlc may leak API keys due to an insecure API key configuration CVSS 3.1MEDIUM 5.5
- TI-2026-17860 wlc can skip SSL verification CVSS 3.1MEDIUM 5.5
Sources
- CVE-2026-42150 · CVE Program
- CVE-2026-42150 · NVD
- FIRST EPSS
- GHSA-gx2m-mcc2-r4p3 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences