Logo
-

Byte Open Security

(ByteOS Network)

Log In

Sign Up

ByteOS

Security
Vulnerability Details
Registries
Custom Views
Weaknesses
Attack Patterns
Filters & Tools
Vulnerability Details :

CVE-2026-33667

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-15 Apr, 2026 | 18:43
Updated At-15 Apr, 2026 | 20:00
Rejected At-
Credits

OpenProject: 2FA OTP Verification Missing Rate Limiting

OpenProject is an open-source project management application. In versions prior to 17.3.0, 2FA OTP verification in the confirm_otp action of the two_factor_authentication module has no rate limiting, lockout mechanism, or failed-attempt tracking. The existing brute_force_block_after_failed_logins setting only counts password login failures and does not apply to the 2FA verification stage, and neither the fail_login nor stage_failure methods increment any counter, lock the account, or add any delay. With the default TOTP drift window of ±60 seconds allowing approximately 5 valid codes at any time, an attacker who knows a user's password can brute-force the 6-digit TOTP code at roughly 5-10 attempts per second with an expected completion time of approximately 11 hours. The same vulnerability applies to backup code verification. This effectively allows complete 2FA bypass for any account where the password is known. This issue has been fixed in version 17.3.0.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:15 Apr, 2026 | 18:43
Updated At:15 Apr, 2026 | 20:00
Rejected At:
▼CVE Numbering Authority (CNA)
OpenProject: 2FA OTP Verification Missing Rate Limiting

OpenProject is an open-source project management application. In versions prior to 17.3.0, 2FA OTP verification in the confirm_otp action of the two_factor_authentication module has no rate limiting, lockout mechanism, or failed-attempt tracking. The existing brute_force_block_after_failed_logins setting only counts password login failures and does not apply to the 2FA verification stage, and neither the fail_login nor stage_failure methods increment any counter, lock the account, or add any delay. With the default TOTP drift window of ±60 seconds allowing approximately 5 valid codes at any time, an attacker who knows a user's password can brute-force the 6-digit TOTP code at roughly 5-10 attempts per second with an expected completion time of approximately 11 hours. The same vulnerability applies to backup code verification. This effectively allows complete 2FA bypass for any account where the password is known. This issue has been fixed in version 17.3.0.

Affected Products
Vendor
opf
Product
openproject
Versions
Affected
  • < 17.3.0
Problem Types
TypeCWE IDDescription
CWECWE-307CWE-307: Improper Restriction of Excessive Authentication Attempts
Type: CWE
CWE ID: CWE-307
Description: CWE-307: Improper Restriction of Excessive Authentication Attempts
Metrics
VersionBase scoreBase severityVector
3.17.4HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Version: 3.1
Base score: 7.4
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/opf/openproject/security/advisories/GHSA-234r-45m2-w6cv
x_refsource_CONFIRM
Hyperlink: https://github.com/opf/openproject/security/advisories/GHSA-234r-45m2-w6cv
Resource:
x_refsource_CONFIRM
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:15 Apr, 2026 | 19:16
Updated At:17 Apr, 2026 | 15:38

OpenProject is an open-source project management application. In versions prior to 17.3.0, 2FA OTP verification in the confirm_otp action of the two_factor_authentication module has no rate limiting, lockout mechanism, or failed-attempt tracking. The existing brute_force_block_after_failed_logins setting only counts password login failures and does not apply to the 2FA verification stage, and neither the fail_login nor stage_failure methods increment any counter, lock the account, or add any delay. With the default TOTP drift window of ±60 seconds allowing approximately 5 valid codes at any time, an attacker who knows a user's password can brute-force the 6-digit TOTP code at roughly 5-10 attempts per second with an expected completion time of approximately 11 hours. The same vulnerability applies to backup code verification. This effectively allows complete 2FA bypass for any account where the password is known. This issue has been fixed in version 17.3.0.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.17.4HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Type: Secondary
Version: 3.1
Base score: 7.4
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-307Primarysecurity-advisories@github.com
CWE ID: CWE-307
Type: Primary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/opf/openproject/security/advisories/GHSA-234r-45m2-w6cvsecurity-advisories@github.com
N/A
Hyperlink: https://github.com/opf/openproject/security/advisories/GHSA-234r-45m2-w6cv
Source: security-advisories@github.com
Resource: N/A

Change History

0
Information is not available yet

Similar CVEs

4Records found

CVE-2026-22603
Matching Score-6
Assigner-GitHub, Inc.
ShareView Details
Matching Score-6
Assigner-GitHub, Inc.
CVSS Score-6.9||MEDIUM
EPSS-0.04% / 12.41%
||
7 Day CHG~0.00%
Published-10 Jan, 2026 | 01:06
Updated-14 Jan, 2026 | 22:27
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
OpenProject has no protection against brute-force attacks in the Change Password function

OpenProject is an open-source, web-based project management software. Prior to version 16.6.2, OpenProject’s unauthenticated password-change endpoint (/account/change_password) was not protected by the same brute-force safeguards that apply to the normal login form. In affected versions, an attacker who can guess or enumerate user IDs can send unlimited password-change requests for a given account without triggering lockout or other rate-limiting controls. This allows automated password-guessing (e.g., with wordlists of common passwords) against valid accounts. Successful guessing results in full account compromise for the targeted user and, depending on that user’s role, can lead to further privilege escalation inside the application. This issue has been patched in version 16.6.2. Those who are unable to upgrade may apply the patch manually.

Action-Not Available
Vendor-openprojectopf
Product-openprojectopenproject
CWE ID-CWE-307
Improper Restriction of Excessive Authentication Attempts
CVE-2022-26964
Matching Score-4
Assigner-MITRE Corporation
ShareView Details
Matching Score-4
Assigner-MITRE Corporation
CVSS Score-7.4||HIGH
EPSS-0.28% / 51.10%
||
7 Day CHG~0.00%
Published-26 Dec, 2022 | 00:00
Updated-14 Apr, 2025 | 16:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Weak password derivation for export in Devolutions Remote Desktop Manager before 2022.1 allows information disclosure via a password brute-force attack. An error caused base64 to be decoded.

Action-Not Available
Vendor-n/aDevolutions
Product-remote_desktop_managern/a
CWE ID-CWE-307
Improper Restriction of Excessive Authentication Attempts
CVE-2026-27981
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-7.4||HIGH
EPSS-0.05% / 17.05%
||
7 Day CHG~0.00%
Published-03 Mar, 2026 | 22:27
Updated-05 Mar, 2026 | 17:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
HomeBox has an Auth Rate Limit Bypass via IP Spoofing

HomeBox is a home inventory and organization system. Prior to 0.24.0, the authentication rate limiter (authRateLimiter) tracks failed attempts per client IP. It determines the client IP by reading, 1. X-Real-IP header, 2. First entry of X-Forwarded-For header, and 3. r.RemoteAddr (TCP connection address). These headers were read unconditionally. An attacker connecting directly to Homebox could forge any value in X-Real-IP, effectively getting a fresh rate limit identity per request. There is a TrustProxy option in the configuration (Options.TrustProxy, default false), but this option was never read by any middleware or rate limiter code. Additionally, chi's middleware.RealIP was applied unconditionally in main.go, overwriting r.RemoteAddr with the forged header value before it reaches any handler. This vulnerability is fixed in 0.24.0.

Action-Not Available
Vendor-sysadminsmediasysadminsmedia
Product-homeboxhomebox
CWE ID-CWE-307
Improper Restriction of Excessive Authentication Attempts
CVE-2024-39398
Matching Score-4
Assigner-Adobe Systems Incorporated
ShareView Details
Matching Score-4
Assigner-Adobe Systems Incorporated
CVSS Score-7.4||HIGH
EPSS-0.21% / 43.28%
||
7 Day CHG+0.05%
Published-14 Aug, 2024 | 11:57
Updated-14 Aug, 2024 | 14:47
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
OTP 2FA can be bruteforced

Adobe Commerce versions 2.4.7-p1, 2.4.6-p6, 2.4.5-p8, 2.4.4-p9 and earlier are affected by an Improper Restriction of Excessive Authentication Attempts vulnerability that could result in a security feature bypass. An attacker could exploit this vulnerability to perform brute force attacks and potentially gain unauthorized access to accounts. Exploitation of this issue does not require user interaction, but attack complexity is high.

Action-Not Available
Vendor-Adobe Inc.
Product-magentocommerceAdobe Commercecommerce
CWE ID-CWE-307
Improper Restriction of Excessive Authentication Attempts
Details not found