What is CVE-2019-12834?

CVE-2019-12834 is a high-severity vulnerability in Ht2labs Learning Locker, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2019-07-16.

How severe is CVE-2019-12834?

High severity. CVSS v3 base score is 7.3 out of 10.

Is CVE-2019-12834 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Ht2labs Learning Locker

CVE-2019-12834

In HT2 Labs Learning Locker 3.15.1, it's possible to inject malicious HTML and JavaScript code into the DOM of the website via the PATH_INFO to the dashboards/ URI.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-07-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.009 (58.4th percentile), scored 2026-10-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Ht2labs Learning Locker — versions 3.15.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

github.com/miruser/Roche-CVEs/blob/master/CVE-2019-12834.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-12834?: CVE-2019-12834 is a high-severity vulnerability in Ht2labs Learning Locker, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2019-07-16.
How severe is CVE-2019-12834?: High severity. CVSS v3 base score is 7.3 out of 10.
Is CVE-2019-12834 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.