CVE-2026-90856

MEDIUM 6.9 PoC AVAILABLE ALL-YEARS

Published 2026-09-15 · Last modified 2026-09-15 · VulDB · NVD: Deferred

A security vulnerability has been detected in SourceCodester College Notes Gallery Management System 1.0. This impacts an unknown function of the file signup.php of the component Registration Flow. Such manipulation of the argument role leads to improper privilege management. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.

EXPLOIT AVAILABLE

Public exploit or PoC code exists. The barrier to attack is reduced — watch closely.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 41st percentile

○ In CISA KEV● Public exploit / PoC◆ SSVC: exploitation poc, automatable yes

Impact if exploited

6.9CVSS 4.0 · MEDIUM · CNA

ConfidentialityLow
IntegrityLow
AvailabilityLow

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
✓User interaction: No user interaction needed
✓Complexity: No special conditions — reliably repeatable
✓Requirements: No special attack requirements

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

reference https://github.com/Andyov0/cve/issues/4
github-search https://github.com/search?q=%22CVE-2026-90856%22&type=repositories

Test against your own equipment

curl -s https://vulnpedia.com/cve/CVE-2026-90856/poc.jsonMachine-readable PoC index for this CVE (for automation).

For defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-90856/poc.json

Affected

Vendors Sourcecodester

Products College Notes Gallery Management System

Weakness (CWE)

CWE-269: Improper Privilege Management
CWE-266: Incorrect Privilege Assignment

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

All CVSS metrics

MEDIUM 6.9 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
HIGH 7.3 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
HIGH 7.3 v3.0 · CNA Primary
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
HIGH 7.5 v2.0 · CNA Primary
AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
MEDIUM 5.5 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
HIGH 7.3 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
HIGH 7.5 v2.0 · NVD Secondary
AV:N/AC:L/Au:N/C:P/I:P/A:P

References

Sources: NVD · CVE.org · EPSS