PatchTheCVECVE-2021-24393: A c GET parameter of the Comment Highlighter WordPress plugin through 0.13 is not properly sanitised, escaped
CVE-2021-24393 is a high-severity flaw (CVSS 7.2) affecting comment highlighter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A c GET parameter of the Comment Highlighter WordPress plugin through 0.13 is not properly sanitised, escaped or validated before inserting to a SQL statement, leading to SQL injection.
Why this priority
- High severity
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.2 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | High |
| User interaction | None |
| EPSS exploit chance | 1.5% (top 25%) |
| CISA exploited list | No |
| Weakness | CWE-89 |
| Published | 2021-09-06 |
| 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-2021-24393?
comment highlighter: upgrade to newer than 0.13. Exact commands for each OS are on this page.
Is CVE-2021-24393 being exploited?
CVE-2021-24393 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-2021-24393 affect?
CVE-2021-24393 affects comment highlighter. Severity is high (CVSS 7.2). A c GET parameter of the Comment Highlighter WordPress plugin through 0.13 is not properly sanitised, escaped or validated before inserting to a SQL statement, leading to SQL injection.
How urgent is CVE-2021-24393?
Priority 49/100. High severity; Public exploit reference