Webmail Patch Triage & Remediation: CVE-2025-49113
Triage a Critical, CISA-KEV-listed Roundcube Webmail PHP object-injection RCE (CVE-2025-49113) reachable by any mailbox user: confirm the version, score it with CVSS, identify CWE-502, judge the low-trust authenticated exposure, upgrade and verify.
Skills you will practice
- Vulnerability and patch management; Vulnerability identification and prioritization; Mail/web application administration and updates
Certifications this lab maps to
This lab builds hands-on skills that appear on these certification exams. thinQtank Learning runs instructor-led training camps for each — click one to see upcoming classes.
The scenario
You are the systems analyst on call. The scanner flagged CVE-2025-49113 — a PHP object-injection RCE in Roundcube Webmail reachable by any authenticated mailbox user — and it is in the CISA KEV catalog. Start by understanding it.
What you will do
- Triage the alert4 steps
Open the ticket · Read the scan report · Which CVE? · Read the ticket
- Confirm the version4 steps
Check the version · What version is running? · Read the advisory · Is the host affected?
- Assess the severity5 steps
Find the CVSS vector · Compute the base score · What is the base score? · Why still Critical with PR:L? · …
- Confirm exposure and scan2 steps
Check exposure · Baseline scan
- Remediate and verify6 steps
Which fixed version? · Upgrade Roundcube · Confirm the version · Verify with a scan · …
How this lab works
A real Linux-style console. Commands run against real files, so hashes, hex dumps and comparisons give real results.
A file browser where you can place evidence into the lab, either the file provided or one of your own.
Reset a single step, a whole task or the entire lab. The environment is rebuilt so you can try again cleanly.
Progress saves after every step. Close the tab and come back later; your files and answers are waiting.