CVE-2021-21253Network attack vector

Password recovery via unsalted SHA-256 hashes

Published Jan 21, 2021 · Updated Aug 3, 2024

Unsalted password hashing in dbijaya OnlineVotingSystem before 1.1.2 allows attackers to recover passwords through dictionary attacks. The SHA256.getSHA method directly digests each password with SHA-256, producing deterministic stored hashes without a per-password salt. Exploitation requires access to the stored hashes; recovered credentials can enable impersonation of affected administrator or voter accounts.

CVSS severity5.3
Medium
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Unsalted password hashing in dbijaya OnlineVotingSystem before 1.1.2 allows attackers to recover passwords through dictionary attacks. The SHA256.getSHA method directly digests each password with SHA-256, producing deterministic stored hashes without a per-password salt. Exploitation requires access to the stored hashes; recovered credentials can enable impersonation of affected administrator or voter accounts.

The record

CVE
CVE-2021-21253
Published
Jan 21, 2021
Updated
Aug 3, 2024
Vendor
dbijaya
Product
OnlineVotingSystem
Classifications
CWE-759, T1110.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

dbijaya · OnlineVotingSystemversion=< 1.1.2

Published CVSS scores

5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.8GitHub Security AdvisoriesCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-759Use of a One-Way Hash without a Salt
T1110.002Password Cracking

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo