How severe is CVE-2023-1717?

CVE-2023-1717 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-1717 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-1717?

CVE-2023-1717 affects Bitrix24. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-1717?

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-2023-1717 published?

CVE-2023-1717 was published on 2023-11-01 and last updated on 2026-06-17.

CVE-2023-1717

CVE-2023-1717 is a critical-severity vulnerability in Bitrix24 with a CVSS 3.x base score of 9.6. 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-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Bitrix24
Published: 2023-11-01
Last modified: 2026-06-17

Description

Prototype pollution in bitrix/templates/bitrix24/components/bitrix/menu/left_vertical/script.js in Bitrix24 22.0.300 allows remote attackers to execute arbitrary JavaScript code in the victim’s browser, and possibly execute arbitrary PHP code on the server if the victim has administrator privilege, via polluting `__proto__[tag]` and `__proto__[text]`.

Frequently asked questions

What is CVE-2023-1717?: Prototype pollution in bitrix/templates/bitrix24/components/bitrix/menu/left_vertical/script.js in Bitrix24 22.0.300 allows remote attackers to execute arbitrary JavaScript code in the victim’s browser, and possibly execute arbitrary PHP code on the server if the victim has administrator privilege, via polluting `__proto__[tag]` and `__proto__[text]`.
How severe is CVE-2023-1717?: CVE-2023-1717 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-1717 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-1717?: CVE-2023-1717 affects Bitrix24. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-1717?: 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-2023-1717 published?: CVE-2023-1717 was published on 2023-11-01 and last updated on 2026-06-17.

References

https://starlabs.sg/advisories/23/23-1717/

Affected products (1)

cpe:2.3:a:bitrix24:bitrix24:22.0.300:*:*:*:*:*:*:*

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-2020-13484 — Critical (CVSS 9.8): Bitrix24 through 20.0.975 allows SSRF via an intranet IP address in the services/main/ajax.php?action=attachUrlPreview…
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-2023-1716 — 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-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →