PatchTheCVECVE-2026-22204: wpDiscuz before 7.6.47 contains an email header injection vulnerability that allows attackers to manipulate ma
CVE-2026-22204 is a low-severity flaw (CVSS 3.7) affecting wpdiscuz. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
wpDiscuz before 7.6.47 contains an email header injection vulnerability that allows attackers to manipulate mail recipients by injecting malicious data into the comment_author_email cookie. Attackers can craft a malicious cookie value that, when processed through urldecode() and passed to wp_mail() functions, enables header injection to alter email recipients or inject additional headers.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 3.7 (Low) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 86%) |
| CISA exploited list | No |
| Weakness | CWE-20 |
| Published | 2026-03-13 |
| 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-2026-22204?
wpdiscuz: upgrade to 7.6.47. Exact commands for each OS are on this page.
Is CVE-2026-22204 being exploited?
CVE-2026-22204 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-2026-22204 affect?
CVE-2026-22204 affects wpdiscuz. Severity is low (CVSS 3.7). wpDiscuz before 7.6.47 contains an email header injection vulnerability that allows attackers to manipulate mail recipients by injecting malicious data into the comment_author_email cookie. Attackers can craft a malicious cookie value that,
How urgent is CVE-2026-22204?
Priority 21/100. Remotely exploitable, no login, no user action
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