English Language Education Reform in Malaysia: A Roadmap (2015-2025) seeks to integrate the teaching of English in Malaysia with the Common European Framework of References (CEFR), which influences the required writing skills of secondary school students. Writing skills acquisition in English as a second language could be compromised by negative psychological implications. By disturbing students' focus, fear, anxiety, and worry can jeopardize the learning process; this is also known as ESL writing anxiety. Pursuant to the CEFR, the goal of this study is to examine the types, levels, and causes of ESL writing anxiety among 43 purposively selected secondary school students in Raub, Pahang. The Second Language Writing Anxiety Inventory (SLWAI) by Cheng (2004) was used to determine the types and levels of writing anxiety, followed by semi-structured interview questions adapted from Rezaei and Jafari's Causes of Writing Anxiety Inventory (CWAI) (2014). Cognitive anxiety is the most common type of ESL writing anxiety among these students (mean = 2.97), followed by somatic anxiety (mean = 2.93), and then avoidance behaviour (mean = 2.2). As for levels of writing anxiety, most of the respondents are at average. As causes of writing anxiety, the themes of (1) negative writing experience, (2) negative writing attitude, and (3) writing knowledge and skill were evaluated in relation to the types and levels of writing anxiety. These findings are designed to inform CEFR-aligned English writing instruction.