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CVE-2021-40617

44
FAUCET Score

CVE-2021-40617 describes a critical SQL Injection vulnerability in openSIS Community Edition version 8.0, specifically within the ForgotPassUserName.php component. This vulnerability allows an unauthenticated attacker to execute arbitrary SQL commands, leading to complete compromise of confidentiality, integrity, and availability. While not observed in active exploitation or on the CISA KEV catalog, public exploit code is available via ExploitDB, and it has a high FAUCET Risk Score of 94/100, indicating a significant threat despite limited community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
8.0CPE matchmatch criteria
cpe:2.3:a:os4ed:opensis:8.0:*:*:*:community:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
5.21%
Probability of exploitation in next 30 days
EPSS Percentile
91.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-52447 · Dec 3, 2025
This CVE's current EPSS score of 0.0521 is in the 86th percentile among its peer group of 36,897 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

Vendor Patches (1)

github_advisoryworkaround availablevia nvd_reference
View patch

References

github.com / MarkLee131/awesome-web-pocs/blob/main/CVE-2021-40617.md
github.com / OS4ED/openSIS-Classic/issues/192
ExploitIssue TrackingMitigationThird Party Advisory