Security Resilience

CVE-2023-1719

Bitrix24 22.0.300

Public PoC
Published
01 November 2023
Modified
21 November 2024
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.050 92th percentile
Risk Priority 83 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-1719 is a high-severity Improper Initialization (CWE-665) vulnerability in Bitrix24 Bitrix24. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2023-1719 is a global variable extraction flaw in Bitrix24 version 22.0.300 that stems from improper initialization of variables in the file bitrix/modules/main/tools.php. The issue is tracked as CWE-665 and carries a CVSS 3.1 score of 7.5.

Unauthenticated remote attackers can supply crafted input to overwrite uninitialized variables, enabling them to enumerate attachments stored on the server and to inject arbitrary JavaScript that executes in a victim browser. When the victim holds administrator privileges, the same technique may also permit arbitrary PHP code execution on the server.

Public advisories describing the vulnerability have been published at https://starlabs.sg/advisories/23/23-1719/.

The associated EPSS score currently stands at 0.8613, matching its observed peak.

EU & UK References

Vulnerability Data

Global variable extraction in bitrix/modules/main/tools.php in Bitrix24 22.0.300 allows unauthenticated remote attackers to (1) enumerate attachments on the server and (2) execute arbitrary JavaScript code in the victim's browser, and possibly execute arbitrary PHP code on the server if the…

more

victim has administrator privilege, via overwriting uninitialised variables.

CWE(s)

Related Threats

CVEs Like This One

CVE-2024-34885Same product: Bitrix24 Bitrix24
CVE-2024-34883Same product: Bitrix24 Bitrix24
CVE-2023-1715Same product: Bitrix24 Bitrix24
CVE-2024-34887Same product: Bitrix24 Bitrix24
CVE-2023-1718Same product: Bitrix24 Bitrix24
CVE-2023-1720Same product: Bitrix24 Bitrix24
CVE-2024-34882Same product: Bitrix24 Bitrix24
CVE-2023-1717Same product: Bitrix24 Bitrix24
CVE-2023-1714Same product: Bitrix24 Bitrix24
CVE-2023-1716Same product: Bitrix24 Bitrix24

Affected Assets

bitrix24
bitrix24
22.0.300

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-665

Ensures shared resources are explicitly initialized or cleared on allocation, preventing exposure of prior contents to new users or processes.

addresses: CWE-665

Mandates that every instance begins in a known (presumably clean) state, eliminating reliance on residual or uninitialized state left by prior executions.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

blocks

A.8.25 mandates security requirements, checkpoints, secure coding, testing and developer capability in the SDLC which reaches improper initialization as a design/coding defect, but leaves a bounded remainder (e.g. initialization of third-party components or libraries chosen in procurement, and post-deployment configuration defaults).

blocks

A.8.27 mandates security-by-design principles (least privilege, default-deny, fail-securely, distrust-external-input, hardening) plus explicit design reviews that can catch and block many uninitialized-resource cases before they ship, but leaves a bounded remainder (e.g. vendor libraries, runtime-initialization bugs, or post-review code changes) that can still be present and exploitable.

prevents

Secure coding standards explicitly forbid uninitialized variables and mandate proper resource initialization before use.

finds

Security testing can detect uninitialized variables but does not itself enforce initialization practices.

blocks

defining, enforcing, and monitoring secure configuration templates (including defaults, disabled services, changed vendor passwords, minimized privileges) directly stops most improper-initialization cases from being exploitable; the bounded remainder is initialization logic inside custom application code that no configuration template reaches

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-665, a class-level weakness. Rules are authored against its narrower children: CWE-770.

References