Cross Site Scripting vulnerability in YiiCMS v.1.0 allows a remote attacker to execute…
Priority LOW 25CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- 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 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Cross Site Scripting vulnerability in YiiCMS v.1.0 allows a remote attacker to execute arbitrary code via the news function.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00553 46th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed sheng/yiicms (Packagist): 1.2.1
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | sheng/yiicms (Packagist) | before 1.2.1 | 1.2.1 | Patch available | GHSA-gqr4-cvf4-3957 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- sheng/yiicms (Packagist) Vendor— Affected before 1.2.1 Fixed in 1.2.1 Patch available GHSA-gqr4-cvf4-3957
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:yiicms_project:yiicms:1.0:*:*:*:*:*:*:* | 1.0 | Vulnerable | Yiicms Project |
- cpe:2.3:a:yiicms_project:yiicms:1.0:*:*:*:*:*:*:* Versions 1.0 Vulnerable ·Yiicms Project
Remediation
- Fix · GHSA-gqr4-cvf4-3957 sheng/yiicms (Packagist) Fixed in 1.2.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-21246
- 2026-10-03 Alias added: GHSA-gqr4-cvf4-3957
References
Sources
- CVE-2020-21246 · CVE Program
- CVE-2020-21246 · NVD
- FIRST EPSS
- GHSA-gqr4-cvf4-3957 · 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