HTML injection in AdminUI through email subject
Priority LOW 27CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- 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 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
Proofpoint Enterprise Protection contains a stored XSS vulnerability in the AdminUI. An unauthenticated attacker can send a specially crafted email with HTML in the subject which triggers XSS when viewing quarantined messages. This issue affects Proofpoint Enterprise Protection: from 8.20.0 before patch 4796, from 8.18.6 before patch 4795 and all other prior versions.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00391 33rd percentileScored 2026-11-07
Fix Fixed Proofpoint Enterprise Protection (Proofpoint): patch 4796, patch 4795
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 |
|---|---|---|---|---|---|
| Proofpoint | Proofpoint Enterprise Protection | 8.20.0 to before patch 4796; 8.18.6 to before patch 4795; 8.0 to before 8.18.6 | patch 4796, patch 4795 | Patch available | CNA |
- Proofpoint Enterprise Protection VendorProofpoint Affected 8.20.0 to before patch 4796; 8.18.6 to before patch 4795; 8.0 to before 8.18.6 Fixed in patch 4796, patch 4795 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:proofpoint:enterprise_protection:*:*:*:*:*:*:*:* | before 8.18.6 | Vulnerable | Proofpoint |
| cpe:2.3:a:proofpoint:enterprise_protection:8.18.6:-:*:*:*:*:*:* | 8.18.6 | Vulnerable | Proofpoint |
| cpe:2.3:a:proofpoint:enterprise_protection:8.20.0:-:*:*:*:*:*:* | 8.20.0 | Vulnerable | Proofpoint |
- cpe:2.3:a:proofpoint:enterprise_protection:*:*:*:*:*:*:*:* Versions before 8.18.6 Vulnerable ·Proofpoint
- cpe:2.3:a:proofpoint:enterprise_protection:8.18.6:-:*:*:*:*:*:* Versions 8.18.6 Vulnerable ·Proofpoint
- cpe:2.3:a:proofpoint:enterprise_protection:8.20.0:-:*:*:*:*:*:* Versions 8.20.0 Vulnerable ·Proofpoint
Remediation
- Fix · CNA Proofpoint Enterprise Protection (Proofpoint) Fixed in patch 4796, patch 4795
Timeline
- 2026-10-02 Threatist record created from CVE-2023-5771
- 2026-10-03 Alias added: GHSA-m8wv-7jj8-p8pv
References
More Proofpoint Enterprise Protection vulnerabilities
- TI-2023-00086 Proofpoint Enterprise Protection webservices unauthenticated RCE CVSS 3.1CRITICAL 9.8
- TI-2022-22879 Proofpoint Enterprise Protection (PPS/PoD) XSS in "Attachment Names" CVSS 3.1CRITICAL 9.6
- TI-2023-00085 Proofpoint Enterprise Protection webutils authenticated RCE CVSS 3.1HIGH 8.8
- TI-2019-14178 A file-extension filtering vulnerability in Proofpoint Enterprise Protection (PPS / PoD)… CVSS 3.1HIGH 8.8
- TI-2022-22880 Proofpoint Enterprise Protection perl eval() arbitrary command execution CVSS 3.1HIGH 7.2
- TI-2022-22881 Proofpoint Enterprise Protection Local Privilege Escalation CVSS 3.1HIGH 7.8
Sources
- CVE-2023-5771 · CVE Program
- CVE-2023-5771 · NVD
- FIRST EPSS
- GHSA-m8wv-7jj8-p8pv · 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