What is CVE-2020-13484?

CVE-2020-13484 is a critical-severity vulnerability in Bitrix24, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2020-06-24.

How severe is CVE-2020-13484?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2020-13484 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in Bitrix24

CVE-2020-13484

Bitrix24 through 20.0.975 allows SSRF via an intranet IP address in the services/main/ajax.php?action=attachUrlPreview url parameter, if the destination URL hosts an HTML document containing '<meta name="og:image" content="' followed by an intranet URL.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2020-06-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.020 (80.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Bitrix24

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

References

gist.github.com/mariuszpoplwski/f261a4bc06adde5c78760559db9d63bd (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-13484?: CVE-2020-13484 is a critical-severity vulnerability in Bitrix24, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2020-06-24.
How severe is CVE-2020-13484?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-13484 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.