CVE-2023-49259
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe authentication cookies are generated using an algorithm based on the username, hardcoded secret and the up-time, and can be guessed in a reasonable time.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceAuthentication cookies are generated using a predictable algorithm combining the username, a hardcoded secret, and system up-time. Since the secret is hardcoded and the up-time is knowable, attackers can brute-force the cookie values in reasonable time, leading to potential account takeover.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 2310271149CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the firmware versionAccess the device management interface or check the firmware file directly. Look for version information in the system settings, boot logs, or firmware filename. Compare the version number to 2310271149.Affected if The firmware version is Hongdian H8951 4g Esp Firmware and is less than 2310271149.
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Extract firmware and search for hardcoded secretsObtain the firmware binary (from device or update file). Use binwalk or similar tools to extract the filesystem. Search the extracted files for hardcoded string literals that may serve as secret keys in authentication code.Affected if A hardcoded secret string is found in the firmware that is used in cookie generation logic.
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Locate cookie generation codeAnalyze the firmware binary or web interface code for functions that generate authentication cookies. Look for algorithms that concatenate username, a secret value, and system up-time or timestamp values.Affected if Cookie generation code combines username, hardcoded secret, and system up-time in the authentication mechanism.
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Verify cookie predictabilityGenerate authentication cookies for the same user account at different times or after device restarts. Compare the cookie values to determine if they follow a predictable pattern based on knowable values.Affected if Cookies can be predicted by knowing the username, hardcoded secret, and system up-time.
The device is affected if it runs Hongdian H8951 4g Esp Firmware version lower than 2310271149 and uses a cookie generation algorithm that incorporates a hardcoded secret and system up-time.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped2310271149
Replace the cookie generation algorithm with cryptographically secure random tokens (e.g., using CSPRNG) and rotate any existing predictable cookies. Avoid using hardcoded secrets and time-based values in authentication mechanisms.
Firmware version 2310271149 or later
- Identify the current firmware version of the H8951 4g Esp device through the device admin interface or CLI
- Download firmware version 2310271149 or later from the vendor's official support website
- Review the vendor's firmware upgrade instructions for the H8951 4g Esp device
- Apply the firmware update following the vendor's recommended procedure, ensuring stable power during the process
- Verify the firmware has been successfully applied by checking the version in the device admin interface
- Confirm the authentication cookie mechanism has been updated by reviewing release notes or vendor documentation if available
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-49259 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-49259 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data