Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.41% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2026-47761High confidence
TinyMCE Cross-Site Scripting (XSS) vulnerability using media plugin `data-mce-object` injection
tinymce · tinymce
Official source article: GitHub GHSA-VG35-5WQ7-3X7W ↗. Check the applicable product and release in the original source.
8.7HighCVSS 3.1
Within 7 days
Patch availableHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
Compensating controls
- Validate the affected product branch and deploy the verified fixed release.
- Restrict the affected network interface to trusted sources where business-safe.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs tinymce tinymce and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Open-source package ranges18 source-attributed ranges
These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.
| Ecosystem and package | Affected range | First fixed version | Evidence |
|---|---|---|---|
| NuGetTinyMCE | ECOSYSTEM: introduced 0; last affected 5.10.9 | Not stated | OSV record ↗aggregator derived · 10 Sep 2026 |
| NuGetTinyMCE | ECOSYSTEM: introduced 6.0.0; fixed 7.9.3 | 7.9.3 | OSV record ↗aggregator derived · 10 Sep 2026 |
| NuGetTinyMCE | ECOSYSTEM: introduced 8.0.0; fixed 8.5.1 | 8.5.1 | OSV record ↗aggregator derived · 10 Sep 2026 |
| Packagisttinymce/tinymce | ECOSYSTEM: introduced 0; last affected 5.10.9 | Not stated | OSV record ↗aggregator derived · 10 Sep 2026 |
| Packagisttinymce/tinymce | ECOSYSTEM: introduced 6.0.0; fixed 7.9.3 | 7.9.3 | OSV record ↗aggregator derived · 10 Sep 2026 |
| Packagisttinymce/tinymce | ECOSYSTEM: introduced 8.0.0; fixed 8.5.1 | 8.5.1 | OSV record ↗aggregator derived · 10 Sep 2026 |
| composertinymce/tinymce | >= 6.0.0, < 7.9.3 | 7.9.3 | GitHub advisory ↗upstream repository advisory · 30 Jun 2026 |
| composertinymce/tinymce | >= 8.0.0, < 8.5.1 | 8.5.1 | GitHub advisory ↗upstream repository advisory · 30 Jun 2026 |
| composertinymce/tinymce | > 0, <= 5.10.9 | Not stated | GitHub advisory ↗upstream repository advisory · 30 Jun 2026 |
| npmtinymce | >= 6.0.0, < 7.9.3 | 7.9.3 | GitHub advisory ↗upstream repository advisory · 30 Jun 2026 |
| npmtinymce | >= 8.0.0, < 8.5.1 | 8.5.1 | GitHub advisory ↗upstream repository advisory · 30 Jun 2026 |
| npmtinymce | > 0, <= 5.10.9 | Not stated | GitHub advisory ↗upstream repository advisory · 30 Jun 2026 |
| npmtinymce | SEMVER: introduced 0; last affected 5.10.9 | Not stated | OSV record ↗aggregator derived · 10 Sep 2026 |
| npmtinymce | SEMVER: introduced 6.0.0; fixed 7.9.3 | 7.9.3 | OSV record ↗aggregator derived · 10 Sep 2026 |
| npmtinymce | SEMVER: introduced 8.0.0; fixed 8.5.1 | 8.5.1 | OSV record ↗aggregator derived · 10 Sep 2026 |
| nugetTinyMCE | >= 6.0.0, < 7.9.3 | 7.9.3 | GitHub advisory ↗upstream repository advisory · 30 Jun 2026 |
| nugetTinyMCE | >= 8.0.0, < 8.5.1 | 8.5.1 | GitHub advisory ↗upstream repository advisory · 30 Jun 2026 |
| nugetTinyMCE | > 0, <= 5.10.9 | Not stated | GitHub advisory ↗upstream repository advisory · 30 Jun 2026 |
Direct vendor intelligence
1 currentAuthoritative vendor CSAF and VEX advisories
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
CVE-2026-47761 · CSAF 2.0 · revision 3 · finalRed Hat Product SecurityTinyMCE: Cross-Site Scripting (XSS) vulnerability using media plugin data-mce-object injection
The vendor explicitly states that these products are not affected by this CVE.
- All currently supported Red Hat products
- Summary
- TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via crafted data-mce-* attributes, which are executed when content is rendered. Impacts users of TinyMCE with the media plugin enabled. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.
- Remediation
- No remediation text is recorded.
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Patch available01
What, why and how
TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via crafted data-mce-* attributes, which are executed when content is rendered. Impacts users of TinyMCE with the media plugin enabled. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.
What
TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via crafted data-mce-* attributes, which are executed when content is rendered. Impacts users of TinyMCE with the media plugin enabled. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.
Why
Attacker-controlled content can reach a browser as executable script without sufficient output encoding or sanitisation.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
TinyMCE is an open source rich text editor. Prior to 5.11.1, 7.9.3, and 8.5.1, there is a stored XSS vulnerability in the media plugin. Attackers can inject malicious scripts via crafted data-mce-* attributes, which are executed when content is rendered. Impacts users of TinyMCE with the media plugin enabled. This vulnerability is fixed in 5.11.1, 7.9.3, and 8.5.1.
Why
Attacker-controlled content can reach a browser as executable script without sufficient output encoding or sanitisation.
How
An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- a network path → Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Network
- Privileges required
- Low: a basic authenticated account is required
- User interaction
- Required interaction required
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Changed: exploitation can affect a different security authority
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-79 ↗
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:NCommon Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SChangedScope: The attack can affect a component governed by a different security authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.ANoneAvailability impact: No direct loss is represented by this metric.- Post-exploitation / living off the land
- No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Patch available
- Action
- Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
- Workaround
- No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
Official vendor articles1 stored document
Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.
- Security Bulletin - September 15 2026 | Atlassian Support | Atlassian Documentation →Original publisher ↗Searchable text snapshot · Captured 26 Sep 2026Unable to load Security Bulletin - September 15 2026 Security Advisories & Bulletins November 2022: Atlassian Security Advisories Overview Archived Security Advisories Security Advisories for Apps July 2022: Atlassian Security Advisories Overview August 2022: Atlassian Security Advisories Overview January 2023: Se
04
Evidence and provenance
Published 28 May 2026 · Last source change 28 May 2026, 15:26 UTC · CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-32922
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.
CVE published
Fixed release or patch reference recorded
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.