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CVE-2020-8984

23
FAUCET Score

CVE-2020-8984 describes an IP address spoofing vulnerability in ZendTo versions prior to 5.22-2 Beta, specifically within the lib/NSSDropbox.php component. This flaw allows an unauthenticated attacker to manipulate the X-Forwarded-For header, leading to a high-severity impact on integrity with a CVSS score of 7.5. While the vulnerability is easily exploitable over the network with low attack complexity, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.10CPE matchmatch criteria
cpe:2.3:a:zend:zendto:3.10:*:*:*:*:*:*:*
3.11CPE matchmatch criteria
cpe:2.3:a:zend:zendto:3.11:*:*:*:*:*:*:*
3.12CPE matchmatch criteria
cpe:2.3:a:zend:zendto:3.12:*:*:*:*:*:*:*
3.13CPE matchmatch criteria
cpe:2.3:a:zend:zendto:3.13:*:*:*:*:*:*:*
3.20CPE matchmatch criteria
cpe:2.3:a:zend:zendto:3.20:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.49%
Probability of exploitation in next 30 days
EPSS Percentile
39.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0049 is in the 17th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jul.es / pipermail/zendto/2020-January/003845.html
Third Party Advisory
zend.to / changelog.php
Release NotesVendor Advisory