How severe is CVE-2020-13484?

CVE-2020-13484 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-13484 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-13484?

CVE-2020-13484 affects Bitrix24. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-13484?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-13484 published?

CVE-2020-13484 was published on 2020-06-24 and last updated on 2026-06-17.

CVE-2020-13484

CVE-2020-13484 is a critical-severity vulnerability in Bitrix24 with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Bitrix24
Published: 2020-06-24
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-13484?: CVE-2020-13484 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-13484 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-13484?: CVE-2020-13484 affects Bitrix24. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-13484?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-13484 published?: CVE-2020-13484 was published on 2020-06-24 and last updated on 2026-06-17.

References

https://gist.github.com/mariuszpoplwski/f261a4bc06adde5c78760559db9d63bd

Affected products (1)

cpe:2.3:a:bitrix24:bitrix24:*:*:*:*:*:*:*:*

More vulnerabilities in Bitrix24

CVE-2022-27228 — Critical (CVSS 9.8): In the vote (aka "Polls, Votes") module before 21.0.100 of Bitrix Site Manager, a remote unauthenticated attacker can…
CVE-2023-1720 — Critical (CVSS 9.6): Lack of mime type response header in Bitrix24 22.0.300 allows authenticated remote attackers to execute arbitrary…
CVE-2023-1717 — Critical (CVSS 9.6): Prototype pollution in bitrix/templates/bitrix24/components/bitrix/menu/left_vertical/script.js in Bitrix24 22.0.300…
CVE-2023-1716 — Critical (CVSS 9.0): Cross-site scripting (XSS) vulnerability in Invoice Edit Page in Bitrix24 22.0.300 allows attackers to execute…
CVE-2023-1715 — Critical (CVSS 9.0): A logic error when using mb_strpos() to check for potential XSS payload in Bitrix24 22.0.300 allows attackers to bypass…
CVE-2023-1714 — High (CVSS 8.8): Unsafe variable extraction in bitrix/modules/main/classes/general/user_options.php in Bitrix24 22.0.300 allows remote…

All CVEs affecting Bitrix24 →

Other CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities

CVE-2026-47938 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) versions 7.4.3 build 9394 and earlier are affected by a Server-Side Request Forgery (SSRF)…
CVE-2026-35431 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Microsoft Entra ID Entitlement Management allows an unauthorized attacker to…
CVE-2026-32186 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Microsoft Bing allows an unauthorized attacker to elevate privileges over a…
CVE-2026-33107 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Azure Databricks allows an unauthorized attacker to elevate privileges over a…
CVE-2026-32871 — Critical (CVSS 10.0): FastMCP is a Pythonic way to build MCP servers and clients. Prior to version 3.2.0, the OpenAPIProvider in FastMCP…
CVE-2026-32169 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Azure Cloud Shell allows an unauthorized attacker to elevate privileges over a…

Browse all CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities →