Markup Markdown < 3.20.10 - Contributor+ Stored XSS
Priority MEDIUM 55Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
The Markup Markdown WordPress plugin before 3.20.10 allows links to contain JavaScript which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0023 13th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Markup Markdown (Unknown): 3.20.10
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 |
|---|---|---|---|---|---|
| Unknown | Markup Markdown | before 3.20.10 | 3.20.10 | Patch available | CNA |
- Markup Markdown VendorUnknown Affected before 3.20.10 Fixed in 3.20.10 Patch available CNA
Remediation
- Fix · CNA Markup Markdown (Unknown) Fixed in 3.20.10
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Markup Markdown 3.20.10
2 records Highest priority Priority MEDIUM 2 MEDIUM
Other records, highest priority first
- TI-2025-08740 Markup Markdown < 3.20.10 - Contributor+ Stored XSSPriority MEDIUM 55
Timeline
- 2026-10-02 Threatist record created from CVE-2025-9540
- 2026-10-03 Alias added: GHSA-grj3-2jxj-j529
References
Sources
- CVE-2025-9540 · CVE Program
- CVE-2025-9540 · NVD
- FIRST EPSS
- GHSA-grj3-2jxj-j529 · 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