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CVE-2016-8900

31
FAUCET Score

CVE-2016-8900 is a critical Object Injection vulnerability affecting Exponent CMS version 2.3.9, specifically within the framework/modules/core/controllers/expTagController.php component. With a CVSS score of 9.8, this vulnerability allows an unauthenticated attacker to achieve complete compromise of confidentiality, integrity, and availability with low attack complexity. Despite its high severity, there is no public exploit code available (Metasploit, Nuclei, ExploitDB), nor is there any evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
2.3.9CPE matchmatch criteria
cpe:2.3:a:exponentcms:exponent_cms:2.3.9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.11%
Probability of exploitation in next 30 days
EPSS Percentile
79.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0211 is in the 69th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / exponentcms/exponent-cms/commit/fdafb5ec97838e4edbd685f587f28d3174ebb3db
PatchThird Party Advisory
openwall.com / lists/oss-security/2016/09/30/5
ExploitMailing ListThird Party Advisory