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CVE-2016-2555

88
FAUCET Score

CVE-2016-2555 describes a critical SQL injection vulnerability in ATutor 2.2.1, specifically within the include/lib/mysql_connect.inc.php component, exploitable via the searchFriends function in friends.inc.php. This flaw allows unauthenticated remote attackers to execute arbitrary SQL commands. With a CVSS v3 score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector, low complexity, and high impact on confidentiality, integrity, and availability. While not listed in CISA KEV, exploit intelligence indicates readily available Metasploit modules and ExploitDB entries for both SQL injection and remote code execution, alongside significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
2.2.1CPE matchmatch criteria
cpe:2.3:a:atutor:atutor:2.2.1:*:*:*:*:*:*:*

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
79.62%
Probability of exploitation in next 30 days
EPSS Percentile
99.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Metasploit: ATutor 2.2.1 Directory Traversal / Remote Code Execution · Mar 1, 2016
ExploitDB: EDB-39514 · Mar 1, 2016
This CVE's current EPSS score of 0.7962 is in the 98th 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 / atutor/ATutor/commit/629b2c992447f7670a2fecc484abfad8c4c2d298
PatchThird Party Advisory
github.com / atutor/ATutor/commit/945a9dca01def8536516088da30fe6a4b7e9fa85
PatchThird Party Advisory
sourceincite.com / research/src-2016-08
ExploitThird Party AdvisoryURL Repurposed
exploit-db.com / exploits/39514
rapid7.com / db/modules/exploit/multi/http/atutor_sqli
Third Party AdvisoryVDB Entry