CVE-2021-45268
mediumpriority · track · 36EPSS 0.018 · 79 %ileEUUSEPSS · scored 2026-10-28
A Cross Site Request Forgery (CSRF) vulnerability exists in Backdrop CMS 1.20, which allows Remote Attackers to gain Remote Code Execution (RCE) on the Hosting Webserver via uploading a maliciously add-on with crafted PHP file. NOTE: the vendor disputes this because the attack requires a session cookie of a high-privileged authenticated user who is entitled to install arbitrary add-ons
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://github.com/V1n1v131r4/CSRF-to-RCE-on-Backdrop-CMScnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-45268cnnvd
- https://www.exploit-db.com/exploits/50323cnnvd
- https://github.com/V1n1v131r4/CSRF-to-RCE-on-Backdrop-CMSenisa_euvd
- https://www.exploit-db.com/exploits/50323enisa_euvd
- https://github.com/V1n1v131r4/CSRF-to-RCE-on-Backdrop-CMSExploitThird Party Advisorynvd
- https://www.exploit-db.com/exploits/50323Third Party AdvisoryVDB Entrynvd
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