CVE-2019-13973 — LayerBB 1

LayerBB 1.1.3 allows admin/general.php arbitrary file upload because the custom_logo filename suffix is not restricted, and .php may be used.

01What is this vulnerability?

LayerBB 1.1.3 allows admin/general.php arbitrary file upload because the custom_logo filename suffix is not restricted, and .php may be used.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-07-19T06:08:05.000Z
• Last modified: 2024-08-05T00:05:44.088Z

09References

• blog.topsec.com.cn — http://blog.topsec.com.cn/%E5%A4%A9%E8%9E%8D%E4%BF%A1%E5%85%B3%E4%BA%8Elayerbb-1…