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CVE-2021-28377

32
FAUCET Score

CVE-2021-28377 is a Directory Traversal vulnerability affecting ChronoForums version 2.0.11, allowing an unauthenticated attacker to read arbitrary files on the server. Rated as Medium severity (CVSS 5.3), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction required, potentially leading to information disclosure. While not currently listed on CISA's KEV catalog and lacking public exploit code on Metasploit or ExploitDB, a Nuclei template for Local File Inclusion exists. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.11CPE matchmatch criteria
cpe:2.3:a:chronoengine:chronoforums:2.0.11:*:*:*:*:joomla:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
8.39%
Probability of exploitation in next 30 days
EPSS Percentile
94.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Nuclei: CVE-2021-28377 · Apr 1, 2022
This CVE's current EPSS score of 0.0839 is in the 93rd percentile among its peer group of 23,725 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

herolab.usd.de / en/security-advisories/usd-2021-0007
ExploitThird Party Advisory