Microweber vulnerable to Cross-site Scripting
Priority MEDIUM 60CWE-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
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Microweber is a drag and drop website builder and content management system. Versions 1.2.12 and prior are vulnerable to copy-paste cross-site scripting (XSS). For this particular type of XSS, the victim needs to be fooled into copying a malicious payload into the text editor. A fix was attempted in versions 1.2.9 and 1.2.12, but it is incomplete.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00621 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 |
|---|---|---|---|---|---|
| microweber | microweber | 1.2.12 – 1.2.12 | — | No fix listed | CNA |
| — | microweber/microweber (Packagist) | up to 1.2.12 | — | No fix listed | GHSA-mv37-xrmc-hf64 |
- microweber Vendormicroweber Affected 1.2.12 – 1.2.12 Fixed in — No fix listed CNA
- microweber/microweber (Packagist) Vendor— Affected up to 1.2.12 Fixed in — No fix listed GHSA-mv37-xrmc-hf64
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microweber:microweber:*:*:*:*:*:*:*:* | up to 1.2.12 | Vulnerable | microweber |
- cpe:2.3:a:microweber:microweber:*:*:*:*:*:*:*:* Versions up to 1.2.12 Vulnerable ·microweber
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-32856
- 2026-10-03 Alias added: GHSA-mv37-xrmc-hf64
- 2026-11-07 EPSS moved to the 50th–90th percentile
References
Advisory 2
More Microweber vulnerabilities
- TI-2023-01763 Command Injection in microweber/microweber CVSS 3.1CRITICAL 9.8
- TI-2023-02100 Improper Privilege Management in microweber/microweber CVSS 3.1HIGH 8.8
- TI-2022-14518 Microweber v1.2.15 was discovered to allow attackers to perform an account takeover via a host header injection attack. CVSS 3.1HIGH 8.8
- TI-2023-04891 Use of Hard-coded Credentials in microweber/microweber CVSS 3.1HIGH 7.5
- TI-2025-37870 Microweber CMS 2.0 has Weak Password Requirements. CVSS 3.1HIGH 8.3
- TI-2022-04247 Cross-site Scripting (XSS) - Stored in microweber/microweber CVSS 3.1MEDIUM 6.1
Sources
- CVE-2021-32856 · CVE Program
- CVE-2021-32856 · NVD
- FIRST EPSS
- GHSA-mv37-xrmc-hf64 · GitHub Advisory Database · CC BY 4.0
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