CVE-2016-4807

Exp

Web2py versions 2.14.5 and below was affected by Reflected XSS vulnerability, which allows an attacker to perform an XSS attack on logged in user (admin).

Published: 2017-01-11 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-4807 is rated High Exploit Risk (64.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.28%). 3 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.87% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2016-4807

EDB-ID Source Kind Published Link
39821 exploit_db edb 2016-05-16 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-4807

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.41% 2.28% +1.87%
2 2025-11-06 0.46% 0.41% -0.05%
3 2025-07-23 — 0.46% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-4807

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 1.7 2.7 [email protected]
3.5 2.0 LOW
AV:N/AC:M/Au:S/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 6.8 2.9 [email protected]

Weakness enumeration for CVE-2016-4807

GitHub Security Advisory for CVE-2016-4807

GHSA-pvcp-73cg-6f77 · Severity: medium · Ecosystem: pip — Web2py Reflected XSS vulnerability

OS Trackers for CVE-2016-4807

vendor priority summary link
ubuntu medium CVE-2016-4807 medium priority: Ubuntu including 1 source packages (web2py), 8 status rows across 8 suites (focal, jammy, noble, oracular, plucky, questing, upstream, xenial): DNE 6, needs-triage 2. https://ubuntu.com/security/CVE-2016-4807

Affected software / configurations for CVE-2016-4807

Vendor Product Version Raw CPE
web2py web2py <= 2.14.5 cpe:2.3:a:web2py:web2py:*:*:*:*:*:*:*:*

References for CVE-2016-4807

URL Tags
http://packetstormsecurity.com/files/137070/Web2py-2.14.5-CSRF-XSS-Local-File-Inclusion.html Exploit Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/39821/ Exploit Third Party Advisory VDB Entry
cvelogic Threat Intelligence