synced 11 MIN AGO
01 Record

CVE-2026-107843

Contao: The registration module re-sends activation mails on any unauthenticated POST, with no throttle and no captcha check

MediumPUBLISHEDCNA: GitHub_M
CNA base score5.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

02 Description

Contao: The registration module re-sends activation mails on any unauthenticated POST, with no throttle and no captcha check

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.27% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 19.0% of scored records. A rank, not a probability.
NVD base score
5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD analysis status
Deferred. NVD last modified this record on 2026-10-16.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-09 19:21Z19 DAYS AGO
Last updated
2026-10-13 17:08Z15 DAYS AGO
Reserved
2026-10-08
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Medium (CVSS 5.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weaknesses
  • CWE-204Observable Response DiscrepancyBase
  • CWE-770Allocation of Resources Without Limits or ThrottlingBase
Data version
5.2
Document digest
ef3fdad35dd1fd71921723afb39749a0d8df1d35cbb1f96b33c7024fac580326

05 Affected products

VendorProductVersionsPlatforms
contaocontao>= 4.1.0, < 5.3.50, >= 5.4.0-RC1, < 5.7.12—

06 References