PatchTheCVECVE-2021-36720: PineApp - Mail Secure - Attacker sending a request to :/blocking.php?url=<script>alert(1)</script> and stealin
CVE-2021-36720 is a medium-severity flaw (CVSS 6.1) affecting mail secure. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
PineApp - Mail Secure - Attacker sending a request to :/blocking.php?url=<script>alert(1)</script> and stealing cookies .
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.6% (top 52%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2021-12-08 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-36720?
mail secure: upgrade to 5.2.1. Exact commands for each OS are on this page.
Is CVE-2021-36720 being exploited?
CVE-2021-36720 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-36720 affect?
CVE-2021-36720 affects mail secure. Severity is medium (CVSS 6.1). PineApp - Mail Secure - Attacker sending a request to :/blocking.php?url=<script>alert(1)</script> and stealing cookies .
How urgent is CVE-2021-36720?
Priority 33/100. No elevated risk signals yet.
Software pages
Related CVEs
- CVE-2021-36719 HIGH 8.8 UPGRADE PineApp - Mail Secure - The attacker must be logged in as a user to the Pineapp system