In the External Redirect Warning Plugin 1.3 for MyBB, the redirect URL (aka external.php?url=) is vulnerable to XSS.
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 · CISA ADP. Fix status from CNA. Impact type from CWE-79.
Summary
In the External Redirect Warning Plugin 1.3 for MyBB, the redirect URL (aka external.php?url=) is vulnerable to XSS.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00558 46th 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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:external_redirect_warning_project:external_redirect_warning:1.3:*:*:*:*:mybb:*:* | 1.3 | Vulnerable | External Redirect Warning Project |
- cpe:2.3:a:external_redirect_warning_project:external_redirect_warning:1.3:*:*:*:*:mybb:*:* Versions 1.3 Vulnerable ·External Redirect Warning Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-28353
- 2026-10-03 Alias added: GHSA-jj3r-qhh5-gc2c
References
Sources
- CVE-2022-28353 · CVE Program
- CVE-2022-28353 · NVD
- FIRST EPSS
- GHSA-jj3r-qhh5-gc2c · GitHub Advisory Database · CC BY 4.0
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