Meow Gallery < 5.5.2 - Author+ Stored XSS via Attachment Alt-Text
Priority MEDIUM 58CWE-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. Impact type from CWE-79.
Summary
The Meow Gallery WordPress plugin before 5.5.2 does not escape an attachment's alt text before outputting it into an attribute of the link it builds for linked galleries, allowing users with the Author role or above to store a JavaScript payload that executes in the browser of any visitor (including administrators) who views a post containing such a gallery.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00226 13th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Meow Gallery (Unknown): 5.5.2
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 | Meow Gallery | before 5.5.2 | 5.5.2 | Patch available | CNA |
- Meow Gallery VendorUnknown Affected before 5.5.2 Fixed in 5.5.2 Patch available CNA
Remediation
- Fix · CNA Meow Gallery (Unknown) Fixed in 5.5.2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-15386
- 2026-10-03 Alias added: GHSA-ff3q-prph-g9j7
References
Sources
- CVE-2026-15386 · CVE Program
- CVE-2026-15386 · NVD
- FIRST EPSS
- GHSA-ff3q-prph-g9j7 · 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