Security readout for executives and security teams
Plain-English summary
CVE-2021-32832 is a denial-of-service issue in Rocket.Chat caused by inefficient regular expressions. An authenticated user could potentially trigger excessive processing and reduce availability. The cited sources say it was fixed in Rocket.Chat 3.11.3, 3.12.2, and 3.13.
Executive priority
Treat this as a moderate availability risk. It is not a data-theft issue based on the sources, but outdated Rocket.Chat instances could be disrupted by authenticated users. Upgrade during the next practical maintenance window, sooner for exposed collaboration systems.
Technical view
The issue is a regular-expression denial of service in Rocket.Chat, mapped to CWE-400 resource consumption. CVSS 3.1 is 4.3: network reachable, low complexity, low privileges required, no user interaction, and low availability impact. Sources do not name a specific endpoint in this bundle.
Likely exposure
Exposure is likely for organizations running Rocket.Chat before the fixed versions, especially deployments reachable by many authenticated users. Systems already upgraded to 3.11.3, 3.12.2, 3.13, or later are the primary remediation target stated by sources.
Exploitation context
CISA KEV is false, and the supplied sources do not state active exploitation. GitHub Security Lab confirmed the vulnerability, but this assessment should not be treated as evidence of exploitation in the wild.
Researcher notes
The source bundle confirms product, impact class, CVSS, and fixed versions. It does not provide endpoint-level exposure details, exploit telemetry, or compensating controls beyond upgrading and consulting Rocket.Chat guidance.
Mitigation direction
- Upgrade Rocket.Chat to 3.11.3, 3.12.2, 3.13, or later.
- Review Rocket.Chat security update guidance for branch-specific instructions.
- Prioritize externally reachable or large multi-user Rocket.Chat deployments.
- Monitor vendor advisories if upgrade timing or branch support is unclear.
Validation and detection
- Inventory all Rocket.Chat deployments and record exact versions.
- Compare deployed versions with the fixed versions named in the CVE.
- Confirm upgrade completion through application version reporting or asset records.
- Review availability monitoring for unexplained Rocket.Chat CPU spikes or latency.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-400: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-32832 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://docs.rocket.chat/guides/security/security-updatesCVE reference · x_refsource_MISC
- https://securitylab.github.com/advisories/GHSL-2020-310-redos-Rocket.Chat/CVE reference · x_refsource_CONFIRM
- https://github.com/RocketChat/Rocket.Chat/releases/tag/3.11.3CVE reference · x_refsource_MISC
- https://github.com/RocketChat/Rocket.Chat/commit/4a0dce973e37ec3f56ca2231d6030511dbdd094cCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.