CVE-2026-27384: boldgrid w3_total_cache
CVSS: 9.8v3.1CriticalDeferred
Published 05-03-2026Last modified 29-04-2026
Vulnerability summary
CVE-2026-27384 is a critical (CVSS 9.8) vulnerability in boldgrid w3_total_cache. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 37.6% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (wordfence)EPSS score
0.45%
0%100%
Low · +0.14 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 05-03-2026PublishedVulnerability first disclosed.
- 29-04-2026Last modifiedVulnerability information updated.
Description
Improper Validation of Specified Quantity in Input vulnerability in BoldGrid W3 Total Cache w3-total-cache allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects W3 Total Cache: from n/a through <= 2.9.1.
CVSS metrics
3 scores · 3 sources · 1 versionCritical 9.8Preferred score · wordfence (Source)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources3 sources · 9.0–9.8
- CVE.orgCNA9.0CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HDiffers
- NVDNIST9.0CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HDiffers
EPSS trend
Probability
0.45%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
+0.14 pp
From 0.30% on 20-09-2026
20-09-202620-10-2026
EPSS score0.45%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-1284Improper Validation of Specified Quantity in InputThe product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.
- CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
Affected systems
Boldgrid1 product
- w3_total_cache≤ 2.9.1
Wordpress1 product
- w3-total-cache≤ 2.9.1 (fixed in 2.9.2)
2 vendors · 2 products
References
2 links- patchstack.com/database/…VDB Entry