Injection in CleanTalk
Priority LOW 35CWE-74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
The CleanTalk WordPress plugin before 6.87 does not prevent unauthenticated, user-supplied comment content from being passed to WordPress's shortcode engine, allowing any visitor to have arbitrary shortcodes registered on the site executed server-side and rendered to every subsequent visitor of the page.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00306 23rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed CleanTalk (Unknown): 6.87
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 | CleanTalk | before 6.87 | 6.87 | Patch available | CNA |
- CleanTalk VendorUnknown Affected before 6.87 Fixed in 6.87 Patch available CNA
Remediation
- Fix · CNA CleanTalk (Unknown) Fixed in 6.87
Timeline
- 2026-10-02 Threatist record created from CVE-2026-19855
- 2026-10-03 Alias added: GHSA-5543-49w7-m8jw
References
Sources
- CVE-2026-19855 · CVE Program
- CVE-2026-19855 · NVD
- FIRST EPSS
- GHSA-5543-49w7-m8jw · 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